EMGUCV Archives - icodebroker

[C#/WPF/EMGUCV] WPF에서 EmguCV 사용하기

■ WPF에서 EmguCV를 사용하는 방법을 보여준다. ▶ BitmapSourceConverter.cs


using System;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;
using System.Windows.Media.Imaging;

using Emgu.CV;

namespace TestProject
{
    /// <summary>
    /// 비트맵 소스 변환기
    /// </summary>
    public static class BitmapSourceConverter
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Import
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 객체 삭제하기 - DeleteObject(objectHandle)

        /// <summary>
        /// 객체 삭제하기
        /// </summary>
        /// <param name="objectHandle">객체 핸들</param>
        /// <returns>처리 결과</returns>
        [DllImport("gdi32")]
        private static extern int DeleteObject(IntPtr objectHandle);

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region 비트맵 소스 구하기 - GetBitmapSource(image)

        /// <summary>
        /// 비트맵 소스 구하기
        /// </summary>
        /// <param name="image">이미지</param>
        /// <returns>비트맵 소스</returns>
        public static BitmapSource GetBitmapSource(IImage image)
        {
            using(Bitmap source = image.Bitmap)
            {
                IntPtr bitmapHandle = source.GetHbitmap();

                BitmapSource bitmapSource = Imaging.CreateBitmapSourceFromHBitmap
                (
                    bitmapHandle,
                    IntPtr.Zero,
                    Int32Rect.Empty,
                    BitmapSizeOptions.FromEmptyOptions()
                );

                DeleteObject(bitmapHandle);

                return bitmapSource;
            }
        }

        #endregion
    }
}

using System;

using System.Drawing;

using System.Runtime.InteropServices;

using System.Windows;

using System.Windows.Interop;

using System.Windows.Media.Imaging;

using Emgu.CV;

namespace TestProject

{

/// <summary>

/// 비트맵 소스 변환기

/// </summary>

public static class BitmapSourceConverter

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Import

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 객체 삭제하기 - DeleteObject(objectHandle)

/// <summary>

/// 객체 삭제하기

/// </summary>

/// <param name="objectHandle">객체 핸들</param>

/// <returns>처리 결과</returns>

[DllImport("gdi32")]

private static extern int DeleteObject(IntPtr objectHandle);

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Public

#region 비트맵 소스 구하기 - GetBitmapSource(image)

/// <summary>

/// 비트맵 소스 구하기

/// </summary>

/// <param name="image">이미지</param>

/// <returns>비트맵 소스</returns>

public static BitmapSource GetBitmapSource(IImage image)

{

using(Bitmap source = image.Bitmap)

{

IntPtr bitmapHandle = source.GetHbitmap();

BitmapSource bitmapSource = Imaging.CreateBitmapSourceFromHBitmap

(

bitmapHandle,

IntPtr.Zero,

Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions()

);

DeleteObject(bitmapHandle);

return bitmapSource;

}

#endregion

}

▶ MainWindow.xaml


<Window x:Class="TestProject.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Hello, world!"
    Width="800"
    Height="600">
    <Grid>
        <Image Name="image"
            Stretch="Fill"
            Initialized="image_Initialized" />
    </Grid>
</Window>

<Window x:Class="TestProject.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="Hello, world!"

Width="800"

Height="600">

<Grid>

<Image Name="image"

Stretch="Fill"

Initialized="image_Initialized" />

</Grid>

</Window>

▶ MainWindow.xaml.cs


using System;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;
using System.Windows.Media.Imaging;

using Emgu.CV;

namespace TestProject
{
    /// <summary>
    /// 비트맵 소스 변환기
    /// </summary>
    public static class BitmapSourceConverter
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Import
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 객체 삭제하기 - DeleteObject(objectHandle)

        /// <summary>
        /// 객체 삭제하기
        /// </summary>
        /// <param name="objectHandle">객체 핸들</param>
        /// <returns>처리 결과</returns>
        [DllImport("gdi32")]
        private static extern int DeleteObject(IntPtr objectHandle);

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region 비트맵 소스 구하기 - GetBitmapSource(image)

        /// <summary>
        /// 비트맵 소스 구하기
        /// </summary>
        /// <param name="image">이미지</param>
        /// <returns>비트맵 소스</returns>
        public static BitmapSource GetBitmapSource(IImage image)
        {
            using(Bitmap source = image.Bitmap)
            {
                IntPtr bitmapHandle = source.GetHbitmap();

                BitmapSource bitmapSource = Imaging.CreateBitmapSourceFromHBitmap
                (
                    bitmapHandle,
                    IntPtr.Zero,
                    Int32Rect.Empty,
                    BitmapSizeOptions.FromEmptyOptions()
                );

                DeleteObject(bitmapHandle);

                return bitmapSource;
            }
        }

        #endregion
    }
}

using System;

using System.Drawing;

using System.Runtime.InteropServices;

using System.Windows;

using System.Windows.Interop;

using System.Windows.Media.Imaging;

using Emgu.CV;

namespace TestProject

{

/// <summary>

/// 비트맵 소스 변환기

/// </summary>

public static class BitmapSourceConverter

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Import

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 객체 삭제하기 - DeleteObject(objectHandle)

/// <summary>

/// 객체 삭제하기

/// </summary>

/// <param name="objectHandle">객체 핸들</param>

/// <returns>처리 결과</returns>

[DllImport("gdi32")]

private static extern int DeleteObject(IntPtr objectHandle);

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Public

#region 비트맵 소스 구하기 - GetBitmapSource(image)

/// <summary>

/// 비트맵 소스 구하기

/// </summary>

/// <param name="image">이미지</param>

/// <returns>비트맵 소스</returns>

public static BitmapSource GetBitmapSource(IImage image)

{

using(Bitmap source = image.Bitmap)

{

IntPtr bitmapHandle = source.GetHbitmap();

BitmapSource bitmapSource = Imaging.CreateBitmapSourceFromHBitmap

(

bitmapHandle,

IntPtr.Zero,

Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions()

);

DeleteObject(bitmapHandle);

return bitmapSource;

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] Tesseract OCR 문자 인식하기

■ Tesseract OCR 문자를 인식하는 방법을 보여준다. ▶ MainForm.cs


using System;
using System.Drawing;
using System.IO;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.OCR;
using Emgu.CV.Structure;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// TESSERACT
        /// </summary>
        private Tesseract tesseract;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            this.tesseract = new Tesseract("", "eng", Tesseract.OcrEngineMode.OEM_TESSERACT_CUBE_COMBINED);

            this.languageValueLabel.Text = "eng : tesseract + cube";

            this.loadLanguageMenuItem.Click += loadLanguageMenuItem_Click;
            this.loadImageButton.Click      += loadImageButton_Click;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 언어 로드 메뉴 항목 클릭시 처리하기 - loadLanguageMenuItem_Click(sender, e)

        /// <summary>
        /// 언어 로드 메뉴 항목 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void loadLanguageMenuItem_Click(object sender, EventArgs e)
        {
            if(this.languageOpenFileDialog.ShowDialog() == DialogResult.OK)
            {
                this.tesseract.Dispose();

                string filePath = Path.GetDirectoryName(this.languageOpenFileDialog.FileName);

                string language =  Path.GetFileNameWithoutExtension(this.languageOpenFileDialog.FileName).Split('.')[0];

                this.tesseract = new Tesseract(filePath, language, Tesseract.OcrEngineMode.OEM_DEFAULT);

                this.languageValueLabel.Text = String.Format("{0} : tesseract", language);
            }
        }

        #endregion
        #region 이미지 로드 버튼 클릭시 처리하기 - loadImageButton_Click(sender, e)

        /// <summary>
        /// 이미지 로드 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void loadImageButton_Click(object sender, EventArgs e)
        {
            if(this.imageOpenFileDialog.ShowDialog() == DialogResult.OK)
            {
                Bgr blueBgr = new Bgr(Color.Blue);

                try
                {
                    Image<Bgr, Byte> image = new Image<Bgr, byte>(this.imageOpenFileDialog.FileName);

                    using(Image<Gray, byte> grayImage = image.Convert<Gray, Byte>())
                    {
                        this.tesseract.Recognize(grayImage);

                        Tesseract.Charactor[] charactorArray = this.tesseract.GetCharactors();

                        foreach(Tesseract.Charactor character in charactorArray)
                        {
                            image.Draw(character.Region, blueBgr, 1);
                        }

                        this.imageBox.Image = image;

                        string result = this.tesseract.GetText();

                        this.resultTextBox.Text = result;
                    }
                }
                catch(Exception exception)
                {
                    MessageBox.Show(exception.Message);
                }
            }
        }

        #endregion
    }
}

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using System;

using System.Drawing;

using System.IO;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.OCR;

using Emgu.CV.Structure;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// TESSERACT

/// </summary>

private Tesseract tesseract;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

this.tesseract = new Tesseract("", "eng", Tesseract.OcrEngineMode.OEM_TESSERACT_CUBE_COMBINED);

this.languageValueLabel.Text = "eng : tesseract + cube";

this.loadLanguageMenuItem.Click += loadLanguageMenuItem_Click;

this.loadImageButton.Click += loadImageButton_Click;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

#region 언어 로드 메뉴 항목 클릭시 처리하기 - loadLanguageMenuItem_Click(sender, e)

/// <summary>

/// 언어 로드 메뉴 항목 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void loadLanguageMenuItem_Click(object sender, EventArgs e)

{

if(this.languageOpenFileDialog.ShowDialog() == DialogResult.OK)

{

this.tesseract.Dispose();

string filePath = Path.GetDirectoryName(this.languageOpenFileDialog.FileName);

string language = Path.GetFileNameWithoutExtension(this.languageOpenFileDialog.FileName).Split('.')[0];

this.tesseract = new Tesseract(filePath, language, Tesseract.OcrEngineMode.OEM_DEFAULT);

this.languageValueLabel.Text = String.Format("{0} : tesseract", language);

}

#endregion

#region 이미지 로드 버튼 클릭시 처리하기 - loadImageButton_Click(sender, e)

/// <summary>

/// 이미지 로드 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void loadImageButton_Click(object sender, EventArgs e)

{

if(this.imageOpenFileDialog.ShowDialog() == DialogResult.OK)

{

Bgr blueBgr = new Bgr(Color.Blue);

try

{

Image<Bgr, Byte> image = new Image<Bgr, byte>(this.imageOpenFileDialog.FileName);

using(Image<Gray, byte> grayImage = image.Convert<Gray, Byte>())

{

this.tesseract.Recognize(grayImage);

Tesseract.Charactor[] charactorArray = this.tesseract.GetCharactors();

foreach(Tesseract.Charactor character in charactorArray)

{

image.Draw(character.Region, blueBgr, 1);

}

this.imageBox.Image = image;

string result = this.tesseract.GetText();

this.resultTextBox.Text = result;

}

catch(Exception exception)

{

MessageBox.Show(exception.Message);

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] 입체 사진 만들기

■ 입체 사진을 만드는 방법을 보여준다. ▶ MainForm.cs


using System;
using System.Drawing;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.Structure;

using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 왼쪽 이미지
        /// </summary>
        private Image<Bgr, Byte> leftImage;

        /// <summary>
        /// 오른쪽 이미지
        /// </summary>
        private Image<Bgr, byte> rightImage;

        /// <summary>
        /// 3D 포인트 배열
        /// </summary>
        private MCvPoint3D32f[] point3DArray;


        /// <summary>
        /// GL 로드 여부
        /// </summary>
        private bool giLoaded = false;

        /// <summary>
        /// 텍스처 배열
        /// </summary>
        private int[] textureArray;

        /// <summary>
        /// 텍스처 이미지
        /// </summary>
        private Image<Bgr, Byte> textureImage;

        /// <summary>
        /// 각도
        /// </summary>
        private double angle = 0.0;

        /// <summary>
        /// 각도 증가치
        /// </summary>
        private double angleIncrement = 0.2;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            this.leftImage  = new Image<Bgr, byte>("imageLeft.png" );
            this.rightImage = new Image<Bgr, byte>("imageRight.png");

            Image<Gray, short> disparityMapImage;

            Computer3DPointArray
            (
                leftImage.Convert<Gray, Byte>(),
                rightImage.Convert<Gray, Byte>(),
                out disparityMapImage,
                out this.point3DArray
            );

            this.disparityMapImageBox.Image = disparityMapImage;

            FormClosed                  += Form_FormClosed;
            this.resultGlControl.Load   += resultGlControl_Load;
            this.resultGlControl.Paint  += resultGlControl_Paint;
            this.resultGlControl.Resize += resultGlControl_Resize;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 폼 닫은 경우 처리하기 - Form_FormClosed(sender, e)

        /// <summary>
        /// 폼 닫은 경우 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Form_FormClosed(object sender, FormClosedEventArgs e)
        {
            this.resultGlControl.Dispose();
        }

        #endregion
        #region 결과 GL 컨트롤 로드시 처리하기 - resultGlControl_Load(sender, e)

        /// <summary>
        /// 결과 GL 컨트롤 로드시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void resultGlControl_Load(object sender, EventArgs e)
        {
            this.giLoaded = true;

            GL.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);

            SetupViewport();

            #region 3D 포인트 클라아두를 위한 텍스처를 생성한다.

            int repeat = (int)All.Repeat;
            int linear = (int)All.Linear;

            GL.Enable(EnableCap.CullFace);
            GL.Enable(EnableCap.Texture2D);

            this.textureArray = new int[1];

            GL.GenTextures(1, this.textureArray);

            GL.BindTexture(TextureTarget.Texture2D, this.textureArray[0]);

            GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureWrapS    , ref repeat);
            GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureWrapT    , ref repeat);
            GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, ref linear);
            GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, ref linear);

            GL.TexEnv(TextureEnvTarget.TextureEnv, TextureEnvParameter.TextureEnvMode, (int)All.Decal);

            GL.ShadeModel(ShadingModel.Smooth);

            GL.Hint(HintTarget.PerspectiveCorrectionHint, HintMode.Nicest);

            GL.BindTexture(TextureTarget.Texture2D, 1);

            Size imageSize = leftImage.Size;

            int maximumDimension = Math.Max(imageSize.Width, imageSize.Height);

            using(Image<Bgr, Byte> squareImage = new Image<Bgr, byte>(maximumDimension, maximumDimension))
            {
                Rectangle roiRectangle = new Rectangle
                (
                    maximumDimension / 2 - imageSize.Width  / 2,
                    maximumDimension / 2 - imageSize.Height / 2,
                    imageSize.Width,
                    imageSize.Height
                );

                squareImage.ROI = roiRectangle;

                CvInvoke.cvCopy(leftImage, squareImage, IntPtr.Zero);

                squareImage.ROI = Rectangle.Empty;

                this.textureImage = squareImage.Resize(512, 512, Emgu.CV.CvEnum.INTER.CV_INTER_CUBIC, true);

                this.textureImage._Flip(Emgu.CV.CvEnum.FLIP.VERTICAL);

                GL.TexImage2D
                (
                    TextureTarget.Texture2D,
                    0,
                    PixelInternalFormat.Rgb8,
                    this.textureImage.Width,
                    this.textureImage.Height,
                    0,
                    PixelFormat.Bgr,
                    PixelType.UnsignedByte,
                    this.textureImage.MIplImage.imageData
                );
            }

            #endregion
        }

        #endregion
        #region 결과 GL 컨트롤 크기 변경시 처리하기 - resultGlControl_Resize(sender, e)

        /// <summary>
        /// 결과 GL 컨트롤 크기 변경시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void resultGlControl_Resize(object sender, EventArgs e)
        {
            if(!this.giLoaded)
            {
                return;
            }

            SetupViewport();
        }

        #endregion
        #region 결과 GL 컨트롤 PAINT 처리하기 - resultGlControl_Paint(sender, e)

        /// <summary>
        /// 결과 GL 컨트롤 PAINT 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void resultGlControl_Paint(object sender, PaintEventArgs e)
        {
            if(!this.giLoaded)
            {
                return;
            }

            GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);

            GL.Enable(EnableCap.Texture2D);

            GL.PushMatrix();

            GL.Rotate(10.0, 0.0, 1.0, 0.0);

            GL.Rotate(this.angle, 0.0, 1.0, 0.0);

            GL.Begin(BeginMode.Points);

            GL.Color4(1.0, 1.0, 1.0, 1.0);

            foreach(MCvPoint3D32f point3D in this.point3DArray)
            {
                GL.TexCoord2(point3D.x + 0.5f, point3D.y + 0.5f);

                GL.Vertex3(point3D.x, point3D.y, point3D.z);
            }

            GL.End();

            GL.PopMatrix();

            if(this.angle >= 30.0 || this.angle <= -30.0)
            {
                this.angleIncrement = -this.angleIncrement;
            }

            this.angle += this.angleIncrement;

            GraphicsContext.CurrentContext.SwapBuffers();

            this.resultGlControl.Invalidate();
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 3D 포인트 배열 계산하기 - Computer3DPointArray(leftImage, rightImage, disparityMapImage, point3DArray)

        /// <summary>
        /// 3D 포인트 배열 계산하기
        /// </summary>
        /// <param name="leftImage">왼쪽 이미지</param>
        /// <param name="rightImage">오른쪽 이미지</param>
        /// <param name="disparityMapImage">차이 맵 이미지</param>
        /// <param name="point3DArray">3D 포인트 배열</param>
        private static void Computer3DPointArray(Image<Gray, Byte> leftImage, Image<Gray, Byte> rightImage, out Image<Gray, short> disparityMapImage,
            out MCvPoint3D32f[] point3DArray)
        {
            Size imageSize = leftImage.Size;

            disparityMapImage = new Image<Gray, short>(imageSize);

          //using(StereoSGBM stereoSolver = new StereoSGBM(5, 64, 0, 0, 0, 0, 0, 0, 0, 0, StereoSGBM.Mode.SGBM))
            using(StereoBM stereoSolver = new StereoBM(Emgu.CV.CvEnum.STEREO_BM_TYPE.BASIC, 0))
            {
                stereoSolver.FindStereoCorrespondence(leftImage, rightImage, disparityMapImage);

                float scale = Math.Max(imageSize.Width, imageSize.Height);

                using
                (
                    Matrix<double> qMartix = new Matrix<double>
                    (
                        new double[,]
                        {
                            { 1.0,  0.0,  0.0, -imageSize.Width  / 2 },
                            { 0.0, -1.0,  0.0,  imageSize.Height / 2 },
                            { 0.0,  0.0, -1.0,  0.0                  },
                            { 0.0,  0.0,  0.0,  scale                }
                        }
                    )
                )
                {
                    point3DArray = PointCollection.ReprojectImageTo3D(disparityMapImage, qMartix);
                }
            }
        }

        #endregion
        #region 뷰포트 셋업하기 - SetupViewport()

        /// <summary>
        /// 뷰포트 셋업하기
        /// </summary>
        private void SetupViewport()
        {
            int width  = this.resultGlControl.Width;
            int height = this.resultGlControl.Height;

            GL.MatrixMode(MatrixMode.Projection);

            GL.LoadIdentity();

            GL.Ortho(-1.5, 1.5, -1.5, 1.5, -1.5, 1.5);

            GL.Viewport(0, 0, width, height);
        }

        #endregion
    }
}

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using System;

using System.Drawing;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.Structure;

using OpenTK.Graphics;

using OpenTK.Graphics.OpenGL;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 왼쪽 이미지

/// </summary>

private Image<Bgr, Byte> leftImage;

/// <summary>

/// 오른쪽 이미지

/// </summary>

private Image<Bgr, byte> rightImage;

/// <summary>

/// 3D 포인트 배열

/// </summary>

private MCvPoint3D32f[] point3DArray;

/// <summary>

/// GL 로드 여부

/// </summary>

private bool giLoaded = false;

/// <summary>

/// 텍스처 배열

/// </summary>

private int[] textureArray;

/// <summary>

/// 텍스처 이미지

/// </summary>

private Image<Bgr, Byte> textureImage;

/// <summary>

/// 각도

/// </summary>

private double angle = 0.0;

/// <summary>

/// 각도 증가치

/// </summary>

private double angleIncrement = 0.2;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

this.leftImage = new Image<Bgr, byte>("imageLeft.png" );

this.rightImage = new Image<Bgr, byte>("imageRight.png");

Image<Gray, short> disparityMapImage;

Computer3DPointArray

(

leftImage.Convert<Gray, Byte>(),

rightImage.Convert<Gray, Byte>(),

out disparityMapImage,

out this.point3DArray

);

this.disparityMapImageBox.Image = disparityMapImage;

FormClosed += Form_FormClosed;

this.resultGlControl.Load += resultGlControl_Load;

this.resultGlControl.Paint += resultGlControl_Paint;

this.resultGlControl.Resize += resultGlControl_Resize;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 폼 닫은 경우 처리하기 - Form_FormClosed(sender, e)

/// <summary>

/// 폼 닫은 경우 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void Form_FormClosed(object sender, FormClosedEventArgs e)

{

this.resultGlControl.Dispose();

}

#endregion

#region 결과 GL 컨트롤 로드시 처리하기 - resultGlControl_Load(sender, e)

/// <summary>

/// 결과 GL 컨트롤 로드시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void resultGlControl_Load(object sender, EventArgs e)

{

this.giLoaded = true;

GL.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);

SetupViewport();

#region 3D 포인트 클라아두를 위한 텍스처를 생성한다.

int repeat = (int)All.Repeat;

int linear = (int)All.Linear;

GL.Enable(EnableCap.CullFace);

GL.Enable(EnableCap.Texture2D);

this.textureArray = new int[1];

GL.GenTextures(1, this.textureArray);

GL.BindTexture(TextureTarget.Texture2D, this.textureArray[0]);

GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureWrapS , ref repeat);

GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureWrapT , ref repeat);

GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, ref linear);

GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, ref linear);

GL.TexEnv(TextureEnvTarget.TextureEnv, TextureEnvParameter.TextureEnvMode, (int)All.Decal);

GL.ShadeModel(ShadingModel.Smooth);

GL.Hint(HintTarget.PerspectiveCorrectionHint, HintMode.Nicest);

GL.BindTexture(TextureTarget.Texture2D, 1);

Size imageSize = leftImage.Size;

int maximumDimension = Math.Max(imageSize.Width, imageSize.Height);

using(Image<Bgr, Byte> squareImage = new Image<Bgr, byte>(maximumDimension, maximumDimension))

{

Rectangle roiRectangle = new Rectangle

(

maximumDimension / 2 - imageSize.Width / 2,

maximumDimension / 2 - imageSize.Height / 2,

imageSize.Width,

imageSize.Height

);

squareImage.ROI = roiRectangle;

CvInvoke.cvCopy(leftImage, squareImage, IntPtr.Zero);

squareImage.ROI = Rectangle.Empty;

this.textureImage = squareImage.Resize(512, 512, Emgu.CV.CvEnum.INTER.CV_INTER_CUBIC, true);

this.textureImage._Flip(Emgu.CV.CvEnum.FLIP.VERTICAL);

GL.TexImage2D

(

TextureTarget.Texture2D,

PixelInternalFormat.Rgb8,

this.textureImage.Width,

this.textureImage.Height,

PixelFormat.Bgr,

PixelType.UnsignedByte,

this.textureImage.MIplImage.imageData

);

}

#endregion

}

#endregion

#region 결과 GL 컨트롤 크기 변경시 처리하기 - resultGlControl_Resize(sender, e)

/// <summary>

/// 결과 GL 컨트롤 크기 변경시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void resultGlControl_Resize(object sender, EventArgs e)

{

if(!this.giLoaded)

{

return;

}

SetupViewport();

}

#endregion

#region 결과 GL 컨트롤 PAINT 처리하기 - resultGlControl_Paint(sender, e)

/// <summary>

/// 결과 GL 컨트롤 PAINT 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void resultGlControl_Paint(object sender, PaintEventArgs e)

{

if(!this.giLoaded)

{

return;

}

GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);

GL.Enable(EnableCap.Texture2D);

GL.PushMatrix();

GL.Rotate(10.0, 0.0, 1.0, 0.0);

GL.Rotate(this.angle, 0.0, 1.0, 0.0);

GL.Begin(BeginMode.Points);

GL.Color4(1.0, 1.0, 1.0, 1.0);

foreach(MCvPoint3D32f point3D in this.point3DArray)

{

GL.TexCoord2(point3D.x + 0.5f, point3D.y + 0.5f);

GL.Vertex3(point3D.x, point3D.y, point3D.z);

}

GL.End();

GL.PopMatrix();

if(this.angle >= 30.0 || this.angle <= -30.0)

{

this.angleIncrement = -this.angleIncrement;

}

this.angle += this.angleIncrement;

GraphicsContext.CurrentContext.SwapBuffers();

this.resultGlControl.Invalidate();

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 3D 포인트 배열 계산하기 - Computer3DPointArray(leftImage, rightImage, disparityMapImage, point3DArray)

/// <summary>

/// 3D 포인트 배열 계산하기

/// </summary>

/// <param name="leftImage">왼쪽 이미지</param>

/// <param name="rightImage">오른쪽 이미지</param>

/// <param name="disparityMapImage">차이 맵 이미지</param>

/// <param name="point3DArray">3D 포인트 배열</param>

private static void Computer3DPointArray(Image<Gray, Byte> leftImage, Image<Gray, Byte> rightImage, out Image<Gray, short> disparityMapImage,

out MCvPoint3D32f[] point3DArray)

{

Size imageSize = leftImage.Size;

disparityMapImage = new Image<Gray, short>(imageSize);

//using(StereoSGBM stereoSolver = new StereoSGBM(5, 64, 0, 0, 0, 0, 0, 0, 0, 0, StereoSGBM.Mode.SGBM))

using(StereoBM stereoSolver = new StereoBM(Emgu.CV.CvEnum.STEREO_BM_TYPE.BASIC, 0))

{

stereoSolver.FindStereoCorrespondence(leftImage, rightImage, disparityMapImage);

float scale = Math.Max(imageSize.Width, imageSize.Height);

using

(

Matrix<double> qMartix = new Matrix<double>

(

new double[,]

{

{ 1.0, 0.0, 0.0, -imageSize.Width / 2 },

{ 0.0, -1.0, 0.0, imageSize.Height / 2 },

{ 0.0, 0.0, -1.0, 0.0 },

{ 0.0, 0.0, 0.0, scale }

}

)

{

point3DArray = PointCollection.ReprojectImageTo3D(disparityMapImage, qMartix);

}

#endregion

#region 뷰포트 셋업하기 - SetupViewport()

/// <summary>

/// 뷰포트 셋업하기

/// </summary>

private void SetupViewport()

{

int width = this.resultGlControl.Width;

int height = this.resultGlControl.Height;

GL.MatrixMode(MatrixMode.Projection);

GL.LoadIdentity();

GL.Ortho(-1.5, 1.5, -1.5, 1.5, -1.5, 1.5);

GL.Viewport(0, 0, width, height);

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] 보행자 검출하기 (Pedestrain Detection)

■ 보행자를 검출하는 방법을 보여준다. (Pedestrain Detection) ▶ PedestrianDetectionHelper.cs


using System;
using System.Diagnostics;

using Emgu.CV;
using Emgu.CV.Structure;
using System.Drawing;
#if !IOS
using Emgu.CV.GPU;
#endif

namespace TestProject
{
    /// <summary>
    /// 보행자 검출 헬퍼
    /// </summary>
    public static class PedestrianDetectionHelper
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region 찾기 - Find(image, processingTime)

        /// <summary>
        /// 찾기
        /// </summary>
        /// <param name="image">이미지</param>
        /// <param name="processingTime">처리 시간</param>
        /// <returns>결과 사각형 배열</returns>
        public static Rectangle[] Find(Image<Bgr, Byte> image, out long processingTime)
        {
            Stopwatch   stopwatch;
            Rectangle[] resultRectangleArray;

            stopwatch = Stopwatch.StartNew();

#if !IOS
            if(GpuInvoke.HasCuda)
            {
                using(GpuHOGDescriptor descriptor = new GpuHOGDescriptor())
                {
                    descriptor.SetSVMDetector(GpuHOGDescriptor.GetDefaultPeopleDetector());

                    using(GpuImage<Bgr, Byte> bgrImage = new GpuImage<Bgr, byte>(image))
                    {
                        using(GpuImage<Bgra, Byte> bgraImage = bgrImage.Convert<Bgra, Byte>())
                        {
                            resultRectangleArray = descriptor.DetectMultiScale(bgraImage);
                        }
                    }
                }
            }
            else
#endif
            {
                using(HOGDescriptor descriptor = new HOGDescriptor())
                {
                    descriptor.SetSVMDetector(HOGDescriptor.GetDefaultPeopleDetector());

                    resultRectangleArray = descriptor.DetectMultiScale(image);
                }
            }

            stopwatch.Stop();

            processingTime = stopwatch.ElapsedMilliseconds;

            return resultRectangleArray;
        }

        #endregion
    }
}

using System;

using System.Diagnostics;

using Emgu.CV;

using Emgu.CV.Structure;

using System.Drawing;

#if !IOS

using Emgu.CV.GPU;

#endif

namespace TestProject

{

/// <summary>

/// 보행자 검출 헬퍼

/// </summary>

public static class PedestrianDetectionHelper

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Public

#region 찾기 - Find(image, processingTime)

/// <summary>

/// 찾기

/// </summary>

/// <param name="image">이미지</param>

/// <param name="processingTime">처리 시간</param>

/// <returns>결과 사각형 배열</returns>

public static Rectangle[] Find(Image<Bgr, Byte> image, out long processingTime)

{

Stopwatch stopwatch;

Rectangle[] resultRectangleArray;

stopwatch = Stopwatch.StartNew();

#if !IOS

if(GpuInvoke.HasCuda)

{

using(GpuHOGDescriptor descriptor = new GpuHOGDescriptor())

{

descriptor.SetSVMDetector(GpuHOGDescriptor.GetDefaultPeopleDetector());

using(GpuImage<Bgr, Byte> bgrImage = new GpuImage<Bgr, byte>(image))

{

using(GpuImage<Bgra, Byte> bgraImage = bgrImage.Convert<Bgra, Byte>())

{

resultRectangleArray = descriptor.DetectMultiScale(bgraImage);

}

else

#endif

{

using(HOGDescriptor descriptor = new HOGDescriptor())

{

descriptor.SetSVMDetector(HOGDescriptor.GetDefaultPeopleDetector());

resultRectangleArray = descriptor.DetectMultiScale(image);

}

stopwatch.Stop();

processingTime = stopwatch.ElapsedMilliseconds;

return resultRectangleArray;

}

#endregion

}

▶ Program.cs


using System;
using System.Drawing;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.Structure;
using Emgu.CV.UI;
using Emgu.CV.GPU;

namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        [STAThread]
        private static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            using(Image<Bgr, Byte> image = new Image<Bgr, byte>("sample.png"))
            {
                long processingTime;

                Rectangle[] resultRectangleArray = PedestrianDetectionHelper.Find(image, out processingTime);

                foreach(Rectangle resultRectangle in resultRectangleArray)
                {
                    image.Draw(resultRectangle, new Bgr(Color.Red), 1);
                }

                ImageViewer.Show
                (
                    image,
                    string.Format
                    (
                        "{0}를 사용해 보행자 검출하기 : {1} 밀리초",
                        GpuInvoke.HasCuda ? "GPU" : "CPU",
                        processingTime
                    )
                );
            }
        }

        #endregion
    }
}

using System;

using System.Drawing;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.Structure;

using Emgu.CV.UI;

using Emgu.CV.GPU;

namespace TestProject

{

/// <summary>

/// 프로그램

/// </summary>

class Program

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 프로그램 시작하기 - Main()

/// <summary>

/// 프로그램 시작하기

/// </summary>

[STAThread]

private static void Main()

{

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false);

using(Image<Bgr, Byte> image = new Image<Bgr, byte>("sample.png"))

{

long processingTime;

Rectangle[] resultRectangleArray = PedestrianDetectionHelper.Find(image, out processingTime);

foreach(Rectangle resultRectangle in resultRectangleArray)

{

image.Draw(resultRectangle, new Bgr(Color.Red), 1);

}

ImageViewer.Show

(

image,

string.Format

(

"{0}를 사용해 보행자 검출하기 : {1} 밀리초",

GpuInvoke.HasCuda ? "GPU" : "CPU",

processingTime

)

);

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] SURF 특징점 찾기

■ SURF 특징점을 찾는 방법을 보여준다. ▶ MatchHelper.cs


using System;
using System.Diagnostics;
using System.Drawing;

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Features2D;
using Emgu.CV.Structure;
using Emgu.CV.Util;
#if !IOS
using Emgu.CV.GPU;
#endif

namespace TestProject
{
    /// <summary>
    /// 매칭 헬퍼
    /// </summary>
    public static class MatchHelper
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region 매칭 찾기 - FindMatch(modelImage, sourceImage, matchTime, modelVectorOfKeyPoint, sourceVectorOfKeyPoint, indexMatrix, maskMatrix, homographyMatrix)

        /// <summary>
        /// 매칭 찾기
        /// </summary>
        /// <param name="modelImage">모델 이미지</param>
        /// <param name="sourceImage">소스 이미지</param>
        /// <param name="matchTime">매칭 시간</param>
        /// <param name="modelVectorOfKeyPoint">모델 키 포인트 벡터</param>
        /// <param name="sourceVectorOfKeyPoint">소스 키 포인트 벡터</param>
        /// <param name="indexMatrix">인덱스 매트릭스</param>
        /// <param name="maskMatrix">마스크 매트릭스</param>
        /// <param name="homographyMatrix">호모 그래피 매트릭스</param>
        public static void FindMatch(Image<Gray, Byte> modelImage, Image<Gray, byte> sourceImage, out long matchTime, out VectorOfKeyPoint modelVectorOfKeyPoint,
            out VectorOfKeyPoint sourceVectorOfKeyPoint, out Matrix<int> indexMatrix, out Matrix<byte> maskMatrix, out HomographyMatrix homographyMatrix)
        {
            int k = 2;

            double uniquenessThreshold = 0.8;

            SURFDetector surfDetector = new SURFDetector(500, false);

            Stopwatch stopwatch;

            homographyMatrix = null;

#if !IOS
            if(GpuInvoke.HasCuda)
            {
                GpuSURFDetector gpuSURFDetector = new GpuSURFDetector(surfDetector.SURFParams, 0.01f);

                using(GpuImage<Gray, Byte> modelGpuImage = new GpuImage<Gray, byte>(modelImage))
                {
                    using(GpuMat<float> modelKeyPointGpuMat = gpuSURFDetector.DetectKeyPointsRaw(modelGpuImage, null))
                    {
                        using(GpuMat<float> modelDescriptorGpuMat = gpuSURFDetector.ComputeDescriptorsRaw(modelGpuImage, null, modelKeyPointGpuMat))
                        {
                            using(GpuBruteForceMatcher<float> matcher = new GpuBruteForceMatcher<float>(DistanceType.L2))
                            {
                                modelVectorOfKeyPoint = new VectorOfKeyPoint();

                                gpuSURFDetector.DownloadKeypoints(modelKeyPointGpuMat, modelVectorOfKeyPoint);

                                stopwatch = Stopwatch.StartNew();

                                using(GpuImage<Gray, Byte> sourceGpuImage = new GpuImage<Gray, byte>(sourceImage))
                                {
                                    using(GpuMat<float> sourceKeyPointGpuMat = gpuSURFDetector.DetectKeyPointsRaw(sourceGpuImage, null))
                                    {
                                        using(GpuMat<float> sourceDescriptorGpuMat = gpuSURFDetector.ComputeDescriptorsRaw(sourceGpuImage, null, sourceKeyPointGpuMat))
                                        {
                                            using(GpuMat<int> matchIndexGpuMat = new GpuMat<int>(sourceDescriptorGpuMat.Size.Height, k, 1, true))
                                            {
                                                using(GpuMat<float> matchDistainceGpuMat = new GpuMat<float>(sourceDescriptorGpuMat.Size.Height, k, 1, true))
                                                {
                                                    using(GpuMat<Byte> maskGpuMat = new GpuMat<byte>(matchIndexGpuMat.Size.Height, 1, 1))
                                                    {
                                                        using(Stream stream = new Stream())
                                                        {
                                                            matcher.KnnMatchSingle
                                                            (
                                                                sourceDescriptorGpuMat,
                                                                modelDescriptorGpuMat,
                                                                matchIndexGpuMat,
                                                                matchDistainceGpuMat,
                                                                k,
                                                                null,
                                                                stream
                                                            );

                                                            indexMatrix = new Matrix<int>(matchIndexGpuMat.Size);

                                                            maskMatrix = new Matrix<byte>(maskGpuMat.Size);

                                                            using(GpuMat<float> col0 = matchDistainceGpuMat.Col(0))
                                                            {
                                                                using(GpuMat<float> col1 = matchDistainceGpuMat.Col(1))
                                                                {
                                                                    GpuInvoke.Multiply(col1, new MCvScalar(uniquenessThreshold), col1, stream);

                                                                    GpuInvoke.Compare(col0, col1, maskGpuMat, CMP_TYPE.CV_CMP_LE, stream);
                                                                }
                                                            }

                                                            sourceVectorOfKeyPoint = new VectorOfKeyPoint();

                                                            gpuSURFDetector.DownloadKeypoints(sourceKeyPointGpuMat, sourceVectorOfKeyPoint);

                                                            stream.WaitForCompletion();

                                                            maskGpuMat.Download(maskMatrix);

                                                            matchIndexGpuMat.Download(indexMatrix);

                                                            if(GpuInvoke.CountNonZero(maskGpuMat) >= 4)
                                                            {
                                                                int nonZeroCount = Features2DToolbox.VoteForSizeAndOrientation
                                                                (
                                                                    modelVectorOfKeyPoint,
                                                                    sourceVectorOfKeyPoint,
                                                                    indexMatrix,
                                                                    maskMatrix,
                                                                    1.5,
                                                                    20
                                                                );

                                                                if(nonZeroCount >= 4)
                                                                {
                                                                    homographyMatrix = Features2DToolbox.GetHomographyMatrixFromMatchedFeatures
                                                                    (
                                                                        modelVectorOfKeyPoint,
                                                                        sourceVectorOfKeyPoint,
                                                                        indexMatrix,
                                                                        maskMatrix,
                                                                        2
                                                                    );
                                                                }
                                                            }

                                                            stopwatch.Stop();
                                                        }
                                                    }
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
            else
#endif
            {
                modelVectorOfKeyPoint = new VectorOfKeyPoint();

                Matrix<float> modelDescriptorMatrix = surfDetector.DetectAndCompute(modelImage, null, modelVectorOfKeyPoint);

                stopwatch = Stopwatch.StartNew();

                sourceVectorOfKeyPoint = new VectorOfKeyPoint();

                Matrix<float> sourceDescriptorMatrix = surfDetector.DetectAndCompute(sourceImage, null, sourceVectorOfKeyPoint);

                BruteForceMatcher<float> matcher = new BruteForceMatcher<float>(DistanceType.L2);

                matcher.Add(modelDescriptorMatrix);

                indexMatrix = new Matrix<int>(sourceDescriptorMatrix.Rows, k);

                using(Matrix<float> distanceMatrix = new Matrix<float>(sourceDescriptorMatrix.Rows, k))
                {
                    matcher.KnnMatch(sourceDescriptorMatrix, indexMatrix, distanceMatrix, k, null);

                    maskMatrix = new Matrix<byte>(distanceMatrix.Rows, 1);

                    maskMatrix.SetValue(255);

                    Features2DToolbox.VoteForUniqueness(distanceMatrix, uniquenessThreshold, maskMatrix);
                }

                int nonZeroCount = CvInvoke.cvCountNonZero(maskMatrix);

                if(nonZeroCount >= 4)
                {
                    nonZeroCount = Features2DToolbox.VoteForSizeAndOrientation
                    (
                        modelVectorOfKeyPoint,
                        sourceVectorOfKeyPoint,
                        indexMatrix,
                        maskMatrix,
                        1.5,
                        20
                    );

                    if(nonZeroCount >= 4)
                    {
                        homographyMatrix = Features2DToolbox.GetHomographyMatrixFromMatchedFeatures
                        (
                            modelVectorOfKeyPoint,
                            sourceVectorOfKeyPoint,
                            indexMatrix,
                            maskMatrix,
                            2
                        );
                    }
                }

                stopwatch.Stop();
            }

            matchTime = stopwatch.ElapsedMilliseconds;
        }

        #endregion
        #region 그리기 - Draw(modelImage, sourceImage, matchTime)

        /// <summary>
        /// 그리기
        /// </summary>
        /// <param name="modelImage">모델 이미지</param>
        /// <param name="sourceImage">소스 이미지</param>
        /// <param name="matchTime">매칭 시간</param>
        /// <returns>이미지</returns>
        public static Image<Bgr, Byte> Draw(Image<Gray, Byte> modelImage, Image<Gray, byte> sourceImage, out long matchTime)
        {
            HomographyMatrix homographyMatrix;
            VectorOfKeyPoint modelVectorOfKeyPoint;
            VectorOfKeyPoint sourceVectorOfKeyPoint;
            Matrix<int>      indexMatrix;
            Matrix<byte>     maskMatrix;

            FindMatch
            (
                modelImage,
                sourceImage,
                out matchTime,
                out modelVectorOfKeyPoint,
                out sourceVectorOfKeyPoint,
                out indexMatrix,
                out maskMatrix,
                out homographyMatrix
            );

            Image<Bgr, Byte> resultImage = Features2DToolbox.DrawMatches
            (
                modelImage,
                modelVectorOfKeyPoint,
                sourceImage,
                sourceVectorOfKeyPoint,
                indexMatrix,
                new Bgr(255, 255, 255),
                new Bgr(255, 255, 255),
                maskMatrix,
                Features2DToolbox.KeypointDrawType.DEFAULT
            );

            if(homographyMatrix != null)
            {
                Rectangle rectangle = modelImage.ROI;

                PointF[] pointArray = new PointF[]
                {
                    new PointF(rectangle.Left , rectangle.Bottom),
                    new PointF(rectangle.Right, rectangle.Bottom),
                    new PointF(rectangle.Right, rectangle.Top   ),
                    new PointF(rectangle.Left , rectangle.Top   )
                };

                homographyMatrix.ProjectPoints(pointArray);

                resultImage.DrawPolyline
                (
                    Array.ConvertAll<PointF, Point>(pointArray, Point.Round),
                    true,
                    new Bgr(Color.Red),
                    5
                );
            }

            return resultImage;
        }

        #endregion
    }
}

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using System;

using System.Diagnostics;

using System.Drawing;

using Emgu.CV;

using Emgu.CV.CvEnum;

using Emgu.CV.Features2D;

using Emgu.CV.Structure;

using Emgu.CV.Util;

#if !IOS

using Emgu.CV.GPU;

#endif

namespace TestProject

{

/// <summary>

/// 매칭 헬퍼

/// </summary>

public static class MatchHelper

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Public

#region 매칭 찾기 - FindMatch(modelImage, sourceImage, matchTime, modelVectorOfKeyPoint, sourceVectorOfKeyPoint, indexMatrix, maskMatrix, homographyMatrix)

/// <summary>

/// 매칭 찾기

/// </summary>

/// <param name="modelImage">모델 이미지</param>

/// <param name="sourceImage">소스 이미지</param>

/// <param name="matchTime">매칭 시간</param>

/// <param name="modelVectorOfKeyPoint">모델 키 포인트 벡터</param>

/// <param name="sourceVectorOfKeyPoint">소스 키 포인트 벡터</param>

/// <param name="indexMatrix">인덱스 매트릭스</param>

/// <param name="maskMatrix">마스크 매트릭스</param>

/// <param name="homographyMatrix">호모 그래피 매트릭스</param>

public static void FindMatch(Image<Gray, Byte> modelImage, Image<Gray, byte> sourceImage, out long matchTime, out VectorOfKeyPoint modelVectorOfKeyPoint,

out VectorOfKeyPoint sourceVectorOfKeyPoint, out Matrix<int> indexMatrix, out Matrix<byte> maskMatrix, out HomographyMatrix homographyMatrix)

{

int k = 2;

double uniquenessThreshold = 0.8;

SURFDetector surfDetector = new SURFDetector(500, false);

Stopwatch stopwatch;

homographyMatrix = null;

#if !IOS

if(GpuInvoke.HasCuda)

{

GpuSURFDetector gpuSURFDetector = new GpuSURFDetector(surfDetector.SURFParams, 0.01f);

using(GpuImage<Gray, Byte> modelGpuImage = new GpuImage<Gray, byte>(modelImage))

{

using(GpuMat<float> modelKeyPointGpuMat = gpuSURFDetector.DetectKeyPointsRaw(modelGpuImage, null))

{

using(GpuMat<float> modelDescriptorGpuMat = gpuSURFDetector.ComputeDescriptorsRaw(modelGpuImage, null, modelKeyPointGpuMat))

{

using(GpuBruteForceMatcher<float> matcher = new GpuBruteForceMatcher<float>(DistanceType.L2))

{

modelVectorOfKeyPoint = new VectorOfKeyPoint();

gpuSURFDetector.DownloadKeypoints(modelKeyPointGpuMat, modelVectorOfKeyPoint);

stopwatch = Stopwatch.StartNew();

using(GpuImage<Gray, Byte> sourceGpuImage = new GpuImage<Gray, byte>(sourceImage))

{

using(GpuMat<float> sourceKeyPointGpuMat = gpuSURFDetector.DetectKeyPointsRaw(sourceGpuImage, null))

{

using(GpuMat<float> sourceDescriptorGpuMat = gpuSURFDetector.ComputeDescriptorsRaw(sourceGpuImage, null, sourceKeyPointGpuMat))

{

using(GpuMat<int> matchIndexGpuMat = new GpuMat<int>(sourceDescriptorGpuMat.Size.Height, k, 1, true))

{

using(GpuMat<float> matchDistainceGpuMat = new GpuMat<float>(sourceDescriptorGpuMat.Size.Height, k, 1, true))

{

using(GpuMat<Byte> maskGpuMat = new GpuMat<byte>(matchIndexGpuMat.Size.Height, 1, 1))

{

using(Stream stream = new Stream())

{

matcher.KnnMatchSingle

(

sourceDescriptorGpuMat,

modelDescriptorGpuMat,

matchIndexGpuMat,

matchDistainceGpuMat,

null,

stream

);

indexMatrix = new Matrix<int>(matchIndexGpuMat.Size);

maskMatrix = new Matrix<byte>(maskGpuMat.Size);

using(GpuMat<float> col0 = matchDistainceGpuMat.Col(0))

{

using(GpuMat<float> col1 = matchDistainceGpuMat.Col(1))

{

GpuInvoke.Multiply(col1, new MCvScalar(uniquenessThreshold), col1, stream);

GpuInvoke.Compare(col0, col1, maskGpuMat, CMP_TYPE.CV_CMP_LE, stream);

}

sourceVectorOfKeyPoint = new VectorOfKeyPoint();

gpuSURFDetector.DownloadKeypoints(sourceKeyPointGpuMat, sourceVectorOfKeyPoint);

stream.WaitForCompletion();

maskGpuMat.Download(maskMatrix);

matchIndexGpuMat.Download(indexMatrix);

if(GpuInvoke.CountNonZero(maskGpuMat) >= 4)

{

int nonZeroCount = Features2DToolbox.VoteForSizeAndOrientation

(

modelVectorOfKeyPoint,

sourceVectorOfKeyPoint,

indexMatrix,

maskMatrix,

1.5,

);

if(nonZeroCount >= 4)

{

homographyMatrix = Features2DToolbox.GetHomographyMatrixFromMatchedFeatures

(

modelVectorOfKeyPoint,

sourceVectorOfKeyPoint,

indexMatrix,

maskMatrix,

);

}

stopwatch.Stop();

}

else

#endif

{

modelVectorOfKeyPoint = new VectorOfKeyPoint();

Matrix<float> modelDescriptorMatrix = surfDetector.DetectAndCompute(modelImage, null, modelVectorOfKeyPoint);

stopwatch = Stopwatch.StartNew();

sourceVectorOfKeyPoint = new VectorOfKeyPoint();

Matrix<float> sourceDescriptorMatrix = surfDetector.DetectAndCompute(sourceImage, null, sourceVectorOfKeyPoint);

BruteForceMatcher<float> matcher = new BruteForceMatcher<float>(DistanceType.L2);

matcher.Add(modelDescriptorMatrix);

indexMatrix = new Matrix<int>(sourceDescriptorMatrix.Rows, k);

using(Matrix<float> distanceMatrix = new Matrix<float>(sourceDescriptorMatrix.Rows, k))

{

matcher.KnnMatch(sourceDescriptorMatrix, indexMatrix, distanceMatrix, k, null);

maskMatrix = new Matrix<byte>(distanceMatrix.Rows, 1);

maskMatrix.SetValue(255);

Features2DToolbox.VoteForUniqueness(distanceMatrix, uniquenessThreshold, maskMatrix);

}

int nonZeroCount = CvInvoke.cvCountNonZero(maskMatrix);

if(nonZeroCount >= 4)

{

nonZeroCount = Features2DToolbox.VoteForSizeAndOrientation

(

modelVectorOfKeyPoint,

sourceVectorOfKeyPoint,

indexMatrix,

maskMatrix,

1.5,

);

if(nonZeroCount >= 4)

{

homographyMatrix = Features2DToolbox.GetHomographyMatrixFromMatchedFeatures

(

modelVectorOfKeyPoint,

sourceVectorOfKeyPoint,

indexMatrix,

maskMatrix,

);

}

stopwatch.Stop();

}

matchTime = stopwatch.ElapsedMilliseconds;

}

#endregion

#region 그리기 - Draw(modelImage, sourceImage, matchTime)

/// <summary>

/// 그리기

/// </summary>

/// <param name="modelImage">모델 이미지</param>

/// <param name="sourceImage">소스 이미지</param>

/// <param name="matchTime">매칭 시간</param>

/// <returns>이미지</returns>

public static Image<Bgr, Byte> Draw(Image<Gray, Byte> modelImage, Image<Gray, byte> sourceImage, out long matchTime)

{

HomographyMatrix homographyMatrix;

VectorOfKeyPoint modelVectorOfKeyPoint;

VectorOfKeyPoint sourceVectorOfKeyPoint;

Matrix<int> indexMatrix;

Matrix<byte> maskMatrix;

FindMatch

(

modelImage,

sourceImage,

out matchTime,

out modelVectorOfKeyPoint,

out sourceVectorOfKeyPoint,

out indexMatrix,

out maskMatrix,

out homographyMatrix

);

Image<Bgr, Byte> resultImage = Features2DToolbox.DrawMatches

(

modelImage,

modelVectorOfKeyPoint,

sourceImage,

sourceVectorOfKeyPoint,

indexMatrix,

new Bgr(255, 255, 255),

maskMatrix,

Features2DToolbox.KeypointDrawType.DEFAULT

);

if(homographyMatrix != null)

{

Rectangle rectangle = modelImage.ROI;

PointF[] pointArray = new PointF[]

{

new PointF(rectangle.Left , rectangle.Bottom),

new PointF(rectangle.Right, rectangle.Bottom),

new PointF(rectangle.Right, rectangle.Top ),

new PointF(rectangle.Left , rectangle.Top )

};

homographyMatrix.ProjectPoints(pointArray);

resultImage.DrawPolyline

(

Array.ConvertAll<PointF, Point>(pointArray, Point.Round),

true,

new Bgr(Color.Red),

);

}

return resultImage;

}

#endregion

}

▶ Program.cs


using System;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.GPU;
using Emgu.CV.Structure;
using Emgu.CV.UI;

namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    static class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        [STAThread]
        private static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            long matchTime;

            using(Image<Gray, Byte> modelImage = new Image<Gray, byte>("box.png"))
            {
                using(Image<Gray, Byte> sourceImage = new Image<Gray, byte>("box_in_scene.png"))
                {
                    Image<Bgr, byte> resultImage = MatchHelper.Draw(modelImage, sourceImage, out matchTime);

                    ImageViewer.Show
                    (
                        resultImage,
                        string.Format
                        (
                            "{0}를 사용해 일치 여부 판단 : {1} 밀리초",
                            GpuInvoke.HasCuda ? "GPU" : "CPU",
                            matchTime
                        )
                    );
                }
            }
        }

        #endregion
    }
}

using System;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.GPU;

using Emgu.CV.Structure;

using Emgu.CV.UI;

namespace TestProject

{

/// <summary>

/// 프로그램

/// </summary>

static class Program

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 프로그램 시작하기 - Main()

/// <summary>

/// 프로그램 시작하기

/// </summary>

[STAThread]

private static void Main()

{

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false);

long matchTime;

using(Image<Gray, Byte> modelImage = new Image<Gray, byte>("box.png"))

{

using(Image<Gray, Byte> sourceImage = new Image<Gray, byte>("box_in_scene.png"))

{

Image<Bgr, byte> resultImage = MatchHelper.Draw(modelImage, sourceImage, out matchTime);

ImageViewer.Show

(

resultImage,

string.Format

(

"{0}를 사용해 일치 여부 판단 : {1} 밀리초",

GpuInvoke.HasCuda ? "GPU" : "CPU",

matchTime

)

);

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] STOP 표지판 인식하기

■ STOP 표지판을 인식하는 방법을 보여준다. ▶ StopSignDetector.cs


using System;
using System.Collections.Generic;
using System.Drawing;

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Features2D;
using Emgu.CV.Structure;
using Emgu.Util;

namespace TestProject
{
    /// <summary>
    /// STOP 표지판 검출기
    /// </summary>
    public class StopSignDetector : DisposableObject
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 추적기
        /// </summary>
        private Features2DTracker<float> tracker;

        /// <summary>
        /// 검출기
        /// </summary>
        private SURFDetector detector;

        /// <summary>
        /// 팔각형 저장소
        /// </summary>
        private MemStorage octagonStorage;

        /// <summary>
        /// 팔각형 윤곽선
        /// </summary>
        private Contour<Point> octagonContour;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - StopSignDetector(modelImage)

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="modelImage">모델 이미지</param>
        public StopSignDetector(Image<Bgr, Byte> modelImage)
        {
            this.detector = new SURFDetector(500, false);

            using(Image<Gray, Byte> maskImage = GetRedPixelMaskImage(modelImage))
            {
                ImageFeature<float>[] imageFeatureArray = this.detector.DetectFeatures(maskImage, null);

                if(imageFeatureArray.Length == 0)
                {
                    throw new Exception("No image feature has been found in the stop sign model");
                }

                this.tracker = new Features2DTracker<float>(imageFeatureArray);
            }

            this.octagonStorage = new MemStorage();

            this.octagonContour = new Contour<Point>(this.octagonStorage);

            this.octagonContour.PushMulti
            (
                new Point[]
                {
                    new Point(1, 0),
                    new Point(2, 0),
                    new Point(3, 1),
                    new Point(3, 2),
                    new Point(2, 3),
                    new Point(1, 3),
                    new Point(0, 2),
                    new Point(0, 1)
                },
                BACK_OR_FRONT.FRONT
            );
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region STOP 표지판 검출하기 - DetectStopSign(sourceImage, imageList, rectangleList)

        /// <summary>
        /// STOP 표지판 검출하기
        /// </summary>
        /// <param name="sourceImage">소스 이미지</param>
        /// <param name="imageList">이미지 리스트</param>
        /// <param name="rectangleList">사각형 리스트</param>
        public void DetectStopSign(Image<Bgr, byte> sourceImage, List<Image<Gray, Byte>> imageList, List<Rectangle> rectangleList)
        {
            Image<Bgr, Byte> smoothImage = sourceImage.SmoothGaussian(5, 5, 1.5, 1.5);

            Image<Gray, Byte> maskImage = GetRedPixelMaskImage(smoothImage);

            maskImage._Dilate(1);

            maskImage._Erode(1);

            using(Image<Gray, Byte> cannyImage = maskImage.Canny(100, 50))
            {
                using(MemStorage storage = new MemStorage())
                {
                    Contour<Point> pointContour = cannyImage.FindContours
                    (
                        CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE,
                        RETR_TYPE.CV_RETR_TREE,
                        storage
                    );

                    FindStopSign(sourceImage, imageList, rectangleList, pointContour);
                }
            }
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Protected

        #region 객체 리소스 해제하기 - DisposeObject()

        /// <summary>
        /// 객체 리소스 해제하기
        /// </summary>
        protected override void DisposeObject()
        {
            this.tracker.Dispose();

            this.octagonStorage.Dispose();
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 빨간색 픽셀 마스크 이미지 구하기 - GetRedPixelMaskImage(sourceImage)

        /// <summary>
        /// 빨간색 픽셀 마스크 이미지 구하기
        /// </summary>
        /// <param name="sourceImage">소스 이미지</param>
        /// <returns>빨간색 픽셀 마스크 이미지</returns>
        private Image<Gray, Byte> GetRedPixelMaskImage(Image<Bgr, byte> sourceImage)
        {
            using(Image<Hsv, Byte> hsvImage = sourceImage.Convert<Hsv, Byte>())
            {
                Image<Gray, Byte>[] channelImageArray = hsvImage.Split();

                try
                {
                    CvInvoke.cvInRangeS
                    (
                        channelImageArray[0],
                        new MCvScalar(20),
                        new MCvScalar(160),
                        channelImageArray[0]
                    );

                    channelImageArray[0]._Not();

                    channelImageArray[1]._ThresholdBinary(new Gray(10), new Gray(255.0));

                    CvInvoke.cvAnd(channelImageArray[0], channelImageArray[1], channelImageArray[0], IntPtr.Zero);
                }
                finally
                {
                    channelImageArray[1].Dispose();
                    channelImageArray[2].Dispose();
                }

                return channelImageArray[0];
            }
        }

        #endregion
        #region STOP 표지판 찾기 - FindStopSign(sourceImage, imageList, rectangleList, pointContour)

        /// <summary>
        /// STOP 표지판 찾기
        /// </summary>
        /// <param name="sourceImage">소스 이미지</param>
        /// <param name="imageList">이미지 리스트</param>
        /// <param name="rectangleList">사각형 리스트</param>
        /// <param name="pointContour">포인트 윤곽선</param>
        private void FindStopSign(Image<Bgr, byte> sourceImage, List<Image<Gray, Byte>> imageList, List<Rectangle> rectangleList, Contour<Point> pointContour)
        {
            for(; pointContour != null; pointContour = pointContour.HNext)
            {
                pointContour.ApproxPoly(pointContour.Perimeter * 0.02, 0, pointContour.Storage);

                if(pointContour.Area > 200)
                {
                    double ratio = CvInvoke.cvMatchShapes
                    (
                        this.octagonContour,
                        pointContour,
                        CONTOURS_MATCH_TYPE.CV_CONTOURS_MATCH_I3,
                        0
                    );

                    if(ratio > 0.1)
                    {
                        Contour<Point> childPointContour = pointContour.VNext;

                        if(childPointContour != null)
                        {
                            FindStopSign(sourceImage, imageList, rectangleList, childPointContour);
                        }

                        continue;
                    }

                    Rectangle rectangle = pointContour.BoundingRectangle;

                    Image<Gray, Byte> candidateImage;

                    using(Image<Bgr, Byte> temporaryImage = sourceImage.Copy(rectangle))
                    {
                        candidateImage = temporaryImage.Convert<Gray, byte>();
                    }

                    using(Image<Gray, Byte> maskImage = new Image<Gray, byte>(rectangle.Size))
                    {
                        maskImage.Draw
                        (
                            pointContour,
                            new Gray(255),
                            new Gray(255),
                            0,
                            -1,
                            new Point(-rectangle.X, -rectangle.Y)
                        );

                        double mean = CvInvoke.cvAvg(candidateImage, maskImage).v0;

                        candidateImage._ThresholdBinary(new Gray(mean), new Gray(255.0));

                        candidateImage._Not();

                        maskImage._Not();

                        candidateImage.SetValue(0, maskImage);
                    }

                    ImageFeature<float>[] imageFeatureArray = this.detector.DetectFeatures(candidateImage, null);

                    int minimumMatchCount = 10;

                    if(imageFeatureArray != null && imageFeatureArray.Length >= minimumMatchCount)
                    {
                        Features2DTracker<float>.MatchedImageFeature[] matchedImageFeatureArray = this.tracker.MatchFeature(imageFeatureArray, 2);

                        int goodMatchCount = 0;

                        foreach(Features2DTracker<float>.MatchedImageFeature matchedImageFeature in matchedImageFeatureArray)
                        {
                            if(matchedImageFeature.SimilarFeatures[0].Distance < 0.5)
                            {
                                goodMatchCount++;
                            }
                        }

                        if(goodMatchCount >= minimumMatchCount)
                        {
                            rectangleList.Add(rectangle);

                            imageList.Add(candidateImage);
                        }
                    }
                }
            }
        }

        #endregion
    }
}

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using System;

using System.Collections.Generic;

using System.Drawing;

using Emgu.CV;

using Emgu.CV.CvEnum;

using Emgu.CV.Features2D;

using Emgu.CV.Structure;

using Emgu.Util;

namespace TestProject

{

/// <summary>

/// STOP 표지판 검출기

/// </summary>

public class StopSignDetector : DisposableObject

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 추적기

/// </summary>

private Features2DTracker<float> tracker;

/// <summary>

/// 검출기

/// </summary>

private SURFDetector detector;

/// <summary>

/// 팔각형 저장소

/// </summary>

private MemStorage octagonStorage;

/// <summary>

/// 팔각형 윤곽선

/// </summary>

private Contour<Point> octagonContour;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - StopSignDetector(modelImage)

/// <summary>

/// 생성자

/// </summary>

/// <param name="modelImage">모델 이미지</param>

public StopSignDetector(Image<Bgr, Byte> modelImage)

{

this.detector = new SURFDetector(500, false);

using(Image<Gray, Byte> maskImage = GetRedPixelMaskImage(modelImage))

{

ImageFeature<float>[] imageFeatureArray = this.detector.DetectFeatures(maskImage, null);

if(imageFeatureArray.Length == 0)

{

throw new Exception("No image feature has been found in the stop sign model");

}

this.tracker = new Features2DTracker<float>(imageFeatureArray);

}

this.octagonStorage = new MemStorage();

this.octagonContour = new Contour<Point>(this.octagonStorage);

this.octagonContour.PushMulti

(

new Point[]

{

new Point(1, 0),

new Point(2, 0),

new Point(3, 1),

new Point(3, 2),

new Point(2, 3),

new Point(1, 3),

new Point(0, 2),

new Point(0, 1)

BACK_OR_FRONT.FRONT

);

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Public

#region STOP 표지판 검출하기 - DetectStopSign(sourceImage, imageList, rectangleList)

/// <summary>

/// STOP 표지판 검출하기

/// </summary>

/// <param name="sourceImage">소스 이미지</param>

/// <param name="imageList">이미지 리스트</param>

/// <param name="rectangleList">사각형 리스트</param>

public void DetectStopSign(Image<Bgr, byte> sourceImage, List<Image<Gray, Byte>> imageList, List<Rectangle> rectangleList)

{

Image<Bgr, Byte> smoothImage = sourceImage.SmoothGaussian(5, 5, 1.5, 1.5);

Image<Gray, Byte> maskImage = GetRedPixelMaskImage(smoothImage);

maskImage._Dilate(1);

maskImage._Erode(1);

using(Image<Gray, Byte> cannyImage = maskImage.Canny(100, 50))

{

using(MemStorage storage = new MemStorage())

{

Contour<Point> pointContour = cannyImage.FindContours

(

CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE,

RETR_TYPE.CV_RETR_TREE,

storage

);

FindStopSign(sourceImage, imageList, rectangleList, pointContour);

}

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Protected

#region 객체 리소스 해제하기 - DisposeObject()

/// <summary>

/// 객체 리소스 해제하기

/// </summary>

protected override void DisposeObject()

{

this.tracker.Dispose();

this.octagonStorage.Dispose();

}

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Private

#region 빨간색 픽셀 마스크 이미지 구하기 - GetRedPixelMaskImage(sourceImage)

/// <summary>

/// 빨간색 픽셀 마스크 이미지 구하기

/// </summary>

/// <param name="sourceImage">소스 이미지</param>

/// <returns>빨간색 픽셀 마스크 이미지</returns>

private Image<Gray, Byte> GetRedPixelMaskImage(Image<Bgr, byte> sourceImage)

{

using(Image<Hsv, Byte> hsvImage = sourceImage.Convert<Hsv, Byte>())

{

Image<Gray, Byte>[] channelImageArray = hsvImage.Split();

try

{

CvInvoke.cvInRangeS

(

channelImageArray[0],

new MCvScalar(20),

new MCvScalar(160),

channelImageArray[0]

);

channelImageArray[0]._Not();

channelImageArray[1]._ThresholdBinary(new Gray(10), new Gray(255.0));

CvInvoke.cvAnd(channelImageArray[0], channelImageArray[1], channelImageArray[0], IntPtr.Zero);

}

finally

{

channelImageArray[1].Dispose();

channelImageArray[2].Dispose();

}

return channelImageArray[0];

}

#endregion

#region STOP 표지판 찾기 - FindStopSign(sourceImage, imageList, rectangleList, pointContour)

/// <summary>

/// STOP 표지판 찾기

/// </summary>

/// <param name="sourceImage">소스 이미지</param>

/// <param name="imageList">이미지 리스트</param>

/// <param name="rectangleList">사각형 리스트</param>

/// <param name="pointContour">포인트 윤곽선</param>

private void FindStopSign(Image<Bgr, byte> sourceImage, List<Image<Gray, Byte>> imageList, List<Rectangle> rectangleList, Contour<Point> pointContour)

{

for(; pointContour != null; pointContour = pointContour.HNext)

{

pointContour.ApproxPoly(pointContour.Perimeter * 0.02, 0, pointContour.Storage);

if(pointContour.Area > 200)

{

double ratio = CvInvoke.cvMatchShapes

(

this.octagonContour,

pointContour,

CONTOURS_MATCH_TYPE.CV_CONTOURS_MATCH_I3,

);

if(ratio > 0.1)

{

Contour<Point> childPointContour = pointContour.VNext;

if(childPointContour != null)

{

FindStopSign(sourceImage, imageList, rectangleList, childPointContour);

}

continue;

}

Rectangle rectangle = pointContour.BoundingRectangle;

Image<Gray, Byte> candidateImage;

using(Image<Bgr, Byte> temporaryImage = sourceImage.Copy(rectangle))

{

candidateImage = temporaryImage.Convert<Gray, byte>();

}

using(Image<Gray, Byte> maskImage = new Image<Gray, byte>(rectangle.Size))

{

maskImage.Draw

(

pointContour,

new Gray(255),

-1,

new Point(-rectangle.X, -rectangle.Y)

);

double mean = CvInvoke.cvAvg(candidateImage, maskImage).v0;

candidateImage._ThresholdBinary(new Gray(mean), new Gray(255.0));

candidateImage._Not();

maskImage._Not();

candidateImage.SetValue(0, maskImage);

}

ImageFeature<float>[] imageFeatureArray = this.detector.DetectFeatures(candidateImage, null);

int minimumMatchCount = 10;

if(imageFeatureArray != null && imageFeatureArray.Length >= minimumMatchCount)

{

Features2DTracker<float>.MatchedImageFeature[] matchedImageFeatureArray = this.tracker.MatchFeature(imageFeatureArray, 2);

int goodMatchCount = 0;

foreach(Features2DTracker<float>.MatchedImageFeature matchedImageFeature in matchedImageFeatureArray)

{

if(matchedImageFeature.SimilarFeatures[0].Distance < 0.5)

{

goodMatchCount++;

}

if(goodMatchCount >= minimumMatchCount)

{

rectangleList.Add(rectangle);

imageList.Add(candidateImage);

}

#endregion

}

▶ MainForm.cs


using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.Structure;
using Emgu.CV.UI;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 검출기
        /// </summary>
        private StopSignDetector detector;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            using(Image<Bgr, Byte> modelImage = new Image<Bgr, Byte>("stop-sign-model.png"))
            {
                using (Image<Bgr, Byte> image = new Image<Bgr, byte>("stop-sign.jpg"))
                {
                    this.detector = new StopSignDetector(modelImage);

                    ProcessImage(image);
                }
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 이미지 로드 버튼 클릭시 처리하기 - loadImageButton_Click(sender, e)

        /// <summary>
        /// 이미지 로드 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void loadImageButton_Click(object sender, EventArgs e)
        {
            DialogResult result = openFileDialog.ShowDialog();

            if(result == DialogResult.OK)
            {
                Image<Bgr, Byte> image;

                try
                {
                    image = new Image<Bgr, byte>(openFileDialog.FileName);
                }
                catch
                {
                    MessageBox.Show("지원하는 파일 포맷이 아닙니다.");

                    return;
                }

                ProcessImage(image);
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 레이블 및 이미지 추가하기 - AddLabelAndImage(startPoint, text, image)

        /// <summary>
        /// 레이블 및 이미지 추가하기
        /// </summary>
        /// <param name="startPoint">시작 위치</param>
        /// <param name="text">텍스트</param>
        /// <param name="image">이미지</param>
        private void AddLabelAndImage(ref Point startPoint, string text, IImage image)
        {
            Label label = new Label();

            this.resultPanel.Controls.Add(label);

            label.Width    = 100;
            label.Height   = 30;
            label.Location = startPoint;
            label.Text     = text;

            startPoint.Y += label.Height;

            ImageBox imageBox = new ImageBox();

            this.resultPanel.Controls.Add(imageBox);

            imageBox.ClientSize = image.Size;
            imageBox.Location   = startPoint;
            imageBox.Image      = image;

            startPoint.Y += imageBox.Height + 10;
        }

        #endregion
        #region 이미지 처리하기 - ProcessImage(image)

        /// <summary>
        /// 이미지 처리하기
        /// </summary>
        /// <param name="image">이미지</param>
        private void ProcessImage(Image<Bgr, byte> image)
        {
            Stopwatch stopwatch = Stopwatch.StartNew();

            List<Image<Gray, Byte>> imageList     = new List<Image<Gray, byte>>();
            List<Rectangle>         rectangleList = new List<Rectangle>();

            this.detector.DetectStopSign(image, imageList, rectangleList);

            stopwatch.Stop();

            this.messageLabel.Text = String.Format("STOP 표지판 검출 시간 : {0} 밀리초", stopwatch.Elapsed.TotalMilliseconds);

            this.resultPanel.Controls.Clear();

            Point startPoint = new Point(10, 10);

            for(int i = 0; i < imageList.Count; i++)
            {
                Rectangle rectangle = rectangleList[i];

                AddLabelAndImage
                (
                    ref startPoint,
                    string.Format
                    (
                        "STOP 표지판 [{0}, {1}]",
                        rectangle.Location.Y + rectangle.Width  / 2,
                        rectangle.Location.Y + rectangle.Height / 2
                    ),
                    imageList[i]
                );

                image.Draw(rectangle, new Bgr(Color.Aquamarine), 2);
            }

            this.imageBox.Image = image;
        }

        #endregion
    }
}

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using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Drawing;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.Structure;

using Emgu.CV.UI;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 검출기

/// </summary>

private StopSignDetector detector;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

using(Image<Bgr, Byte> modelImage = new Image<Bgr, Byte>("stop-sign-model.png"))

{

using (Image<Bgr, Byte> image = new Image<Bgr, byte>("stop-sign.jpg"))

{

this.detector = new StopSignDetector(modelImage);

ProcessImage(image);

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 이미지 로드 버튼 클릭시 처리하기 - loadImageButton_Click(sender, e)

/// <summary>

/// 이미지 로드 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void loadImageButton_Click(object sender, EventArgs e)

{

DialogResult result = openFileDialog.ShowDialog();

if(result == DialogResult.OK)

{

Image<Bgr, Byte> image;

try

{

image = new Image<Bgr, byte>(openFileDialog.FileName);

}

catch

{

MessageBox.Show("지원하는 파일 포맷이 아닙니다.");

return;

}

ProcessImage(image);

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 레이블 및 이미지 추가하기 - AddLabelAndImage(startPoint, text, image)

/// <summary>

/// 레이블 및 이미지 추가하기

/// </summary>

/// <param name="startPoint">시작 위치</param>

/// <param name="text">텍스트</param>

/// <param name="image">이미지</param>

private void AddLabelAndImage(ref Point startPoint, string text, IImage image)

{

Label label = new Label();

this.resultPanel.Controls.Add(label);

label.Width = 100;

label.Height = 30;

label.Location = startPoint;

label.Text = text;

startPoint.Y += label.Height;

ImageBox imageBox = new ImageBox();

this.resultPanel.Controls.Add(imageBox);

imageBox.ClientSize = image.Size;

imageBox.Location = startPoint;

imageBox.Image = image;

startPoint.Y += imageBox.Height + 10;

}

#endregion

#region 이미지 처리하기 - ProcessImage(image)

/// <summary>

/// 이미지 처리하기

/// </summary>

/// <param name="image">이미지</param>

private void ProcessImage(Image<Bgr, byte> image)

{

Stopwatch stopwatch = Stopwatch.StartNew();

List<Image<Gray, Byte>> imageList = new List<Image<Gray, byte>>();

List<Rectangle> rectangleList = new List<Rectangle>();

this.detector.DetectStopSign(image, imageList, rectangleList);

stopwatch.Stop();

this.messageLabel.Text = String.Format("STOP 표지판 검출 시간 : {0} 밀리초", stopwatch.Elapsed.TotalMilliseconds);

this.resultPanel.Controls.Clear();

Point startPoint = new Point(10, 10);

for(int i = 0; i < imageList.Count; i++)

{

Rectangle rectangle = rectangleList[i];

AddLabelAndImage

(

ref startPoint,

string.Format

(

"STOP 표지판 [{0}, {1}]",

rectangle.Location.Y + rectangle.Width / 2,

rectangle.Location.Y + rectangle.Height / 2

imageList[i]

);

image.Draw(rectangle, new Bgr(Color.Aquamarine), 2);

}

this.imageBox.Image = image;

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] Latent SVM 검출기 사용하기

■ Latent SVM 검출기를 사용하는 방법을 보여준다. ▶ Program.cs


using System;
using System.Drawing;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.Structure;
using Emgu.CV.UI;
using System.Diagnostics;

namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    static class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        [STAThread]
        private static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Run();
        }

        #endregion

        #region 실행하기 - Run()

        /// <summary>
        /// 실행하기
        /// </summary>
        private static void Run()
        {
            using(Image<Bgr, Byte> image = new Image<Bgr, byte>("cat.jpg"))
            {
                using(LatentSvmDetector detector = new LatentSvmDetector("cat.xml"))
                {
                    Stopwatch stopwatch = Stopwatch.StartNew();

                    MCvObjectDetection[] objectDetectionArray = detector.Detect(image, 0.5f);

                    stopwatch.Stop();

                    foreach(MCvObjectDetection objectDetection in objectDetectionArray)
                    {
                        if(objectDetection.score > -0.5)
                        {
                            image.Draw(objectDetection.Rect, new Bgr(Color.Red), 1);
                        }
                    }

                    ImageViewer.Show(image, String.Format("객체 탐지 : {0} 밀리초", stopwatch.ElapsedMilliseconds));
                }
            }
        }

        #endregion
    }
}

using System;

using System.Drawing;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.Structure;

using Emgu.CV.UI;

using System.Diagnostics;

namespace TestProject

{

/// <summary>

/// 프로그램

/// </summary>

static class Program

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 프로그램 시작하기 - Main()

/// <summary>

/// 프로그램 시작하기

/// </summary>

[STAThread]

private static void Main()

{

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false);

Run();

}

#endregion

#region 실행하기 - Run()

/// <summary>

/// 실행하기

/// </summary>

private static void Run()

{

using(Image<Bgr, Byte> image = new Image<Bgr, byte>("cat.jpg"))

{

using(LatentSvmDetector detector = new LatentSvmDetector("cat.xml"))

{

Stopwatch stopwatch = Stopwatch.StartNew();

MCvObjectDetection[] objectDetectionArray = detector.Detect(image, 0.5f);

stopwatch.Stop();

foreach(MCvObjectDetection objectDetection in objectDetectionArray)

{

if(objectDetection.score > -0.5)

{

image.Draw(objectDetection.Rect, new Bgr(Color.Red), 1);

}

ImageViewer.Show(image, String.Format("객체 탐지 : {0} 밀리초", stopwatch.ElapsedMilliseconds));

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] 평면 분할하기

■ 평면을 분할하는 방법을 보여준다. ▶ PlanarSubdivisionHelper.cs


using System;
using System.Drawing;

using Emgu.CV;
using Emgu.CV.Structure;

namespace TestProject
{
    /// <summary>
    /// 평면 분할 헬퍼
    /// </summary>
    public static class PlanarSubdivisionHelper
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region 평면 분할 생성하기 - CreateSubdivision(maximumValue, pointCount, delaunayTriangleArray, voronoiFacetArray)

        /// <summary>
        /// 평면 분할 생성하기
        /// </summary>
        /// <param name="maximumValue">최대 값</param>
        /// <param name="pointCount">포인트 카운트</param>
        /// <param name="delaunayTriangleArray">들로네 삼각형 배열</param>
        /// <param name="voronoiFacetArray">보로노이 패싯 배열</param>
        public static void CreatePlanarSubdivision(float maximumValue, int pointCount, out Triangle2DF[] delaunayTriangleArray, out VoronoiFacet[] voronoiFacetArray)
        {
            #region 0에서 최대 값을 갖는 범위에서 임의 위치를 생성한다.

            PointF[] pointArray = new PointF[pointCount];

            Random random = new Random((int)(DateTime.Now.Ticks & 0x0000ffff));

            for(int i = 0; i < pointArray.Length; i++)
            {
                pointArray[i] = new PointF((float)random.NextDouble() * maximumValue, (float)random.NextDouble() * maximumValue);
            }

            #endregion

            using(PlanarSubdivision subdivision = new PlanarSubdivision(pointArray))
            {
                delaunayTriangleArray = subdivision.GetDelaunayTriangles();

                voronoiFacetArray = subdivision.GetVoronoiFacets();
            }
        }

        #endregion
        #region 평면 분할 그리기 - DrawPlanarSubdivision(maximumValue, pointCount)

        /// <summary>
        /// 평면 분할 그리기
        /// </summary>
        /// <param name="maximumValue">최대 값</param>
        /// <param name="pointCount">포인트 수</param>
        /// <returns></returns>
        public static Image<Bgr, Byte> DrawPlanarSubdivision(float maximumValue, int pointCount)
        {
            Triangle2DF[]  delaunayTriangleArray; // 들로네 삼각형 배열
            VoronoiFacet[] voronoiFacetArray;     // 보로노이 패싯 배열

            Random random = new Random((int)(DateTime.Now.Ticks & 0x0000ffff));

            CreatePlanarSubdivision(maximumValue, pointCount, out delaunayTriangleArray, out voronoiFacetArray);

            Image<Bgr, Byte> targetImage = new Image<Bgr, byte>((int)maximumValue, (int)maximumValue);

            foreach(VoronoiFacet voronoiFacet in voronoiFacetArray)
            {
                Point[] pointArray = Array.ConvertAll<PointF, Point>(voronoiFacet.Vertices, Point.Round);

                targetImage.FillConvexPoly
                (
                    pointArray,
                    new Bgr(random.NextDouble() * 120, random.NextDouble() * 120, random.NextDouble() * 120)
                );

                targetImage.DrawPolyline(pointArray, true, new Bgr(Color.Black), 2);

                targetImage.Draw(new CircleF(voronoiFacet.Point, 5.0f), new Bgr(Color.Red), 0);
            }

            foreach(Triangle2DF triangle in delaunayTriangleArray)
            {
                targetImage.Draw(triangle, new Bgr(Color.White), 1);
            }

            return targetImage;
        }

        #endregion
    }
}

using System;

using System.Drawing;

using Emgu.CV;

using Emgu.CV.Structure;

namespace TestProject

{

/// <summary>

/// 평면 분할 헬퍼

/// </summary>

public static class PlanarSubdivisionHelper

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Public

#region 평면 분할 생성하기 - CreateSubdivision(maximumValue, pointCount, delaunayTriangleArray, voronoiFacetArray)

/// <summary>

/// 평면 분할 생성하기

/// </summary>

/// <param name="maximumValue">최대 값</param>

/// <param name="pointCount">포인트 카운트</param>

/// <param name="delaunayTriangleArray">들로네 삼각형 배열</param>

/// <param name="voronoiFacetArray">보로노이 패싯 배열</param>

public static void CreatePlanarSubdivision(float maximumValue, int pointCount, out Triangle2DF[] delaunayTriangleArray, out VoronoiFacet[] voronoiFacetArray)

{

#region 0에서 최대 값을 갖는 범위에서 임의 위치를 생성한다.

PointF[] pointArray = new PointF[pointCount];

Random random = new Random((int)(DateTime.Now.Ticks & 0x0000ffff));

for(int i = 0; i < pointArray.Length; i++)

{

pointArray[i] = new PointF((float)random.NextDouble() * maximumValue, (float)random.NextDouble() * maximumValue);

}

#endregion

using(PlanarSubdivision subdivision = new PlanarSubdivision(pointArray))

{

delaunayTriangleArray = subdivision.GetDelaunayTriangles();

voronoiFacetArray = subdivision.GetVoronoiFacets();

}

#endregion

#region 평면 분할 그리기 - DrawPlanarSubdivision(maximumValue, pointCount)

/// <summary>

/// 평면 분할 그리기

/// </summary>

/// <param name="maximumValue">최대 값</param>

/// <param name="pointCount">포인트 수</param>

/// <returns></returns>

public static Image<Bgr, Byte> DrawPlanarSubdivision(float maximumValue, int pointCount)

{

Triangle2DF[] delaunayTriangleArray; // 들로네 삼각형 배열

VoronoiFacet[] voronoiFacetArray; // 보로노이 패싯 배열

Random random = new Random((int)(DateTime.Now.Ticks & 0x0000ffff));

CreatePlanarSubdivision(maximumValue, pointCount, out delaunayTriangleArray, out voronoiFacetArray);

Image<Bgr, Byte> targetImage = new Image<Bgr, byte>((int)maximumValue, (int)maximumValue);

foreach(VoronoiFacet voronoiFacet in voronoiFacetArray)

{

Point[] pointArray = Array.ConvertAll<PointF, Point>(voronoiFacet.Vertices, Point.Round);

targetImage.FillConvexPoly

(

pointArray,

new Bgr(random.NextDouble() * 120, random.NextDouble() * 120, random.NextDouble() * 120)

);

targetImage.DrawPolyline(pointArray, true, new Bgr(Color.Black), 2);

targetImage.Draw(new CircleF(voronoiFacet.Point, 5.0f), new Bgr(Color.Red), 0);

}

foreach(Triangle2DF triangle in delaunayTriangleArray)

{

targetImage.Draw(triangle, new Bgr(Color.White), 1);

}

return targetImage;

}

#endregion

}

▶ Program.cs


using System;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.Structure;
using Emgu.CV.UI;

namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    static class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        [STAThread]
        private static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            Image<Bgr, Byte> image = PlanarSubdivisionHelper.DrawPlanarSubdivision(600, 20);

            ImageViewer.Show(image, "평면 분할하기");
        }

        #endregion
    }
}

using System;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.Structure;

using Emgu.CV.UI;

namespace TestProject

{

/// <summary>

/// 프로그램

/// </summary>

static class Program

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 프로그램 시작하기 - Main()

/// <summary>

/// 프로그램 시작하기

/// </summary>

[STAThread]

private static void Main()

{

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false);

Image<Bgr, Byte> image = PlanarSubdivisionHelper.DrawPlanarSubdivision(600, 20);

ImageViewer.Show(image, "평면 분할하기");

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] 비디오 감시하기

■ 비디오로 감시하는 방법을 보여준다. ▶ MainForm.cs


using System;
using System.Drawing;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;
using Emgu.CV.VideoSurveillance;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 폰트
        /// </summary>
        private MCvFont font = new MCvFont(FONT.CV_FONT_HERSHEY_SIMPLEX, 1.0, 1.0);

        /// <summary>
        /// 캡처
        /// </summary>
        private Capture capture;

        /// <summary>
        /// 추적기
        /// </summary>
        private BlobTrackerAuto<Bgr> tracker;

        /// <summary>
        /// 검출기
        /// </summary>
        private IBGFGDetector<Bgr> detector;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            Run();
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 애플리케이션 휴지시 처리하기 - Application_Idle(sender, e)

        /// <summary>
        /// 애플리케이션 휴지시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Application_Idle(object sender, EventArgs e)
        {
            Image<Bgr, Byte> captureImage = this.capture.QueryFrame();

            captureImage._SmoothGaussian(3);

            this.detector.Update(captureImage);

            Image<Gray, Byte> maskImage = this.detector.ForegroundMask;

            this.tracker.Process(captureImage, maskImage);

            foreach(MCvBlob blob in this.tracker)
            {
                captureImage.Draw((Rectangle)blob, new Bgr(255.0, 255.0, 255.0), 2);

                captureImage.Draw(blob.ID.ToString(), ref this.font, Point.Round(blob.Center), new Bgr(255.0, 255.0, 255.0));
            }

            this.captureImageBox.Image = captureImage;

            this.maskImageBox.Image = maskImage;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 실행하기 - Run()

        /// <summary>
        /// 실행하기
        /// </summary>
        private void Run()
        {
            try
            {
                this.capture = new Capture();
            }
            catch(Exception exception)
            {
                MessageBox.Show(exception.Message);

                return;
            }

            this.detector = new FGDetector<Bgr>(FORGROUND_DETECTOR_TYPE.FGD);

            this.tracker = new BlobTrackerAuto<Bgr>();

            Application.Idle += Application_Idle;
        }

        #endregion
    }
}

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using System;

using System.Drawing;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.CvEnum;

using Emgu.CV.Structure;

using Emgu.CV.VideoSurveillance;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 폰트

/// </summary>

private MCvFont font = new MCvFont(FONT.CV_FONT_HERSHEY_SIMPLEX, 1.0, 1.0);

/// <summary>

/// 캡처

/// </summary>

private Capture capture;

/// <summary>

/// 추적기

/// </summary>

private BlobTrackerAuto<Bgr> tracker;

/// <summary>

/// 검출기

/// </summary>

private IBGFGDetector<Bgr> detector;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

Run();

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 애플리케이션 휴지시 처리하기 - Application_Idle(sender, e)

/// <summary>

/// 애플리케이션 휴지시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void Application_Idle(object sender, EventArgs e)

{

Image<Bgr, Byte> captureImage = this.capture.QueryFrame();

captureImage._SmoothGaussian(3);

this.detector.Update(captureImage);

Image<Gray, Byte> maskImage = this.detector.ForegroundMask;

this.tracker.Process(captureImage, maskImage);

foreach(MCvBlob blob in this.tracker)

{

captureImage.Draw((Rectangle)blob, new Bgr(255.0, 255.0, 255.0), 2);

captureImage.Draw(blob.ID.ToString(), ref this.font, Point.Round(blob.Center), new Bgr(255.0, 255.0, 255.0));

}

this.captureImageBox.Image = captureImage;

this.maskImageBox.Image = maskImage;

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 실행하기 - Run()

/// <summary>

/// 실행하기

/// </summary>

private void Run()

{

try

{

this.capture = new Capture();

}

catch(Exception exception)

{

MessageBox.Show(exception.Message);

return;

}

this.detector = new FGDetector<Bgr>(FORGROUND_DETECTOR_TYPE.FGD);

this.tracker = new BlobTrackerAuto<Bgr>();

Application.Idle += Application_Idle;

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] 사진 이어 붙이기

■ 사진을 이어 붙이는 방법을 보여준다. ▶ MainForm.cs


using System;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Stitching;
using Emgu.CV.Structure;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 파일 열기 대화 상자
        /// </summary>
        private OpenFileDialog openFileDialog;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            this.openFileDialog = new OpenFileDialog();

            this.openFileDialog.CheckFileExists = true;
            this.openFileDialog.Multiselect     = true;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 이미지 선택 버튼 클릭시 처리하기 - selectButton_Click(sender, e)

        /// <summary>
        /// 이미지 선택 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void selectButton_Click(object sender, EventArgs e)
        {
            if(this.openFileDialog.ShowDialog() == DialogResult.OK)
            {
                this.imageDataGridView.Rows.Clear();

                Image<Bgr, Byte>[] sourceImageArray = new Image<Bgr, byte>[this.openFileDialog.FileNames.Length];

                int sourceImageArrayLength = sourceImageArray.Length;

                for(int i = 0; i < sourceImageArrayLength; i++)
                {
                    sourceImageArray[i] = new Image<Bgr, byte>(this.openFileDialog.FileNames[i]);

                    using(Image<Bgr, byte> thumbnailImage = sourceImageArray[i].Resize(200, 200, INTER.CV_INTER_CUBIC, true))
                    {
                        DataGridViewRow row = this.imageDataGridView.Rows[imageDataGridView.Rows.Add()];

                        row.Cells["fileNameColumn" ].Value = this.openFileDialog.FileNames[i];
                        row.Cells["thumbnailColumn"].Value = thumbnailImage.ToBitmap();

                        row.Height = 200;
                    }
                }

                try
                {
                    using(Stitcher stitcher = new Stitcher(true))
                    {
                        Image<Bgr, Byte> resultImage = stitcher.Stitch(sourceImageArray);

                        this.resultImageBox.Image = resultImage;
                    }
                }
                finally
                {
                    foreach(Image<Bgr, Byte> sourceImage in sourceImageArray)
                    {
                        sourceImage.Dispose();
                    }
                }
            }
        }

        #endregion
    }
}

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using System;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.CvEnum;

using Emgu.CV.Stitching;

using Emgu.CV.Structure;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 파일 열기 대화 상자

/// </summary>

private OpenFileDialog openFileDialog;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

this.openFileDialog = new OpenFileDialog();

this.openFileDialog.CheckFileExists = true;

this.openFileDialog.Multiselect = true;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 이미지 선택 버튼 클릭시 처리하기 - selectButton_Click(sender, e)

/// <summary>

/// 이미지 선택 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void selectButton_Click(object sender, EventArgs e)

{

if(this.openFileDialog.ShowDialog() == DialogResult.OK)

{

this.imageDataGridView.Rows.Clear();

Image<Bgr, Byte>[] sourceImageArray = new Image<Bgr, byte>[this.openFileDialog.FileNames.Length];

int sourceImageArrayLength = sourceImageArray.Length;

for(int i = 0; i < sourceImageArrayLength; i++)

{

sourceImageArray[i] = new Image<Bgr, byte>(this.openFileDialog.FileNames[i]);

using(Image<Bgr, byte> thumbnailImage = sourceImageArray[i].Resize(200, 200, INTER.CV_INTER_CUBIC, true))

{

DataGridViewRow row = this.imageDataGridView.Rows[imageDataGridView.Rows.Add()];

row.Cells["fileNameColumn" ].Value = this.openFileDialog.FileNames[i];

row.Cells["thumbnailColumn"].Value = thumbnailImage.ToBitmap();

row.Height = 200;

}

try

{

using(Stitcher stitcher = new Stitcher(true))

{

Image<Bgr, Byte> resultImage = stitcher.Stitch(sourceImageArray);

this.resultImageBox.Image = resultImage;

}

finally

{

foreach(Image<Bgr, Byte> sourceImage in sourceImageArray)

{

sourceImage.Dispose();

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] 자동차 번호판 인식하기

■ 자동차 번호판을 인식하는 방법을 보여준다. ▶ LicensePlateDetector.cs


using System;
using System.Collections.Generic;
using System.Drawing;
using System.Text;

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.OCR;
using Emgu.CV.Structure;
using Emgu.Util;

namespace TestProject
{
    /// <summary>
    /// 자동차 번호판 검출기
    /// </summary>
    public class LicensePlateDetector : DisposableObject
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// OCR
        /// </summary>
        private Tesseract ocr;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - LicensePlateDetector(dataPath)

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="dataPath">데이터 경로</param>
        public LicensePlateDetector(string dataPath)
        {
            this.ocr = new Tesseract(dataPath, "eng", Tesseract.OcrEngineMode.OEM_TESSERACT_CUBE_COMBINED);

            this.ocr.SetVariable("tessedit_char_whitelist", "ABCDEFGHIJKLMNOPQRSTUVWXYZ-1234567890");
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 자동차 번호판 검출하기 - DetectLicensePlate(sourceImage, licensePlateImageList, filteredLicensePlateImageList, detectedLicensePlateRectangleList)

        /// <summary>
        /// 자동차 번호판 검출하기
        /// </summary>
        /// <param name="sourceImage">소스 이미지</param>
        /// <param name="licensePlateImageList">자동차 번호판 이미지 리스트</param>
        /// <param name="filteredLicensePlateImageList">필터 자동차 번호판 이미지 리스트</param>
        /// <param name="detectedLicensePlateRectangleList">검출 자동차 번호판 사각형 리스트</param>
        /// <returns>자동차 번호 리스트</returns>
        public List<string> DetectLicensePlate
        (
            Image<Bgr, byte> sourceImage,
            List<Image<Gray, Byte>> licensePlateImageList,
            List<Image<Gray, Byte>> filteredLicensePlateImageList,
            List<MCvBox2D> detectedLicensePlateRectangleList)
        {
            List<string> licenseList = new List<String>();

            using(Image<Gray, byte> grayscaleImage = sourceImage.Convert<Gray, Byte>())
            {
                using(Image<Gray, Byte> cannyImage = new Image<Gray, byte>(grayscaleImage.Size))
                {
                    using(MemStorage storage = new MemStorage())
                    {
                        CvInvoke.cvCanny(grayscaleImage, cannyImage, 100, 50, 3);

                        Contour<Point> pointContour = cannyImage.FindContours
                        (
                            CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE,
                            RETR_TYPE.CV_RETR_TREE,
                            storage
                        );

                        FindLicensePlate
                        (
                            pointContour,
                            grayscaleImage,
                            cannyImage,
                            licensePlateImageList,
                            filteredLicensePlateImageList,
                            detectedLicensePlateRectangleList,
                            licenseList
                        );
                    }
                }
            }

            return licenseList;
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 흰색 픽셀 마스크 구하기 - GetWhitePixelMask(image)

        /// <summary>
        /// 흰색 픽셀 마스크 구하기
        /// </summary>
        /// <param name="image">이미지</param>
        /// <returns>흰색 픽셀 마스크</returns>
        /// <remarks>
        /// 흰색 픽셀은 채도가 40보다 작거나 200보다 큰 경우에 해당한다.
        /// </remarks>
        private static Image<Gray, Byte> GetWhitePixelMask(Image<Bgr, byte> image)
        {
            using(Image<Hsv, Byte> hsvImage = image.Convert<Hsv, Byte>())
            {
                Image<Gray, Byte>[] grayscaleImageArray = hsvImage.Split();

                try
                {
                    grayscaleImageArray[1]._ThresholdBinaryInv(new Gray(40), new Gray(255));

                    grayscaleImageArray[2]._ThresholdBinary(new Gray(200), new Gray(255));

                    CvInvoke.cvAnd(grayscaleImageArray[1], grayscaleImageArray[2], grayscaleImageArray[0], IntPtr.Zero);
                }
                finally
                {
                    grayscaleImageArray[1].Dispose();
                    grayscaleImageArray[2].Dispose();
                }

                return grayscaleImageArray[0];
            }
        }

        #endregion
        #region 자식 카운트 구하기 - GetChildCount(contour)

        /// <summary>
        /// 자식 카운트 구하기
        /// </summary>
        /// <param name="contour">윤곽</param>
        /// <returns>자식 카운트</returns>
        private static int GetChildCount(Contour<Point> contour)
        {
            Contour<Point> childContour = contour.VNext;

            if(childContour == null)
            {
                return 0;
            }

            int count = 0;

            while(childContour != null)
            {
                count++;

                childContour = childContour.HNext;
            }

            return count;
        }

        #endregion
        #region 자동차 번호판 찾기 - FindLicensePlate(pointContour, grayscaleImage, cannyImage, licensePlateImageList, filteredLicensePlateImageList,
            detectedLicensePlateRectangleList, licenseList)

        /// <summary>
        /// 자동차 번호판 찾기
        /// </summary>
        /// <param name="pointContour">포인트 윤곽</param>
        /// <param name="grayscaleImage">회색조 이미지</param>
        /// <param name="cannyImage">캐니 이미지</param>
        /// <param name="licensePlateImageList">자동차 번호판 이미지 리스트</param>
        /// <param name="filteredLicensePlateImageList">필터 자동차 번호판 이미지 리스트</param>
        /// <param name="detectedLicensePlateRectangleList">검출 자동차 번호판 사각형 리스트</param>
        /// <param name="licenseList">자동차 번호 리스트</param>
        private void FindLicensePlate
        (
            Contour<Point> pointContour,
            Image<Gray, Byte> grayscaleImage,
            Image<Gray, Byte> cannyImage,
            List<Image<Gray, Byte>> licensePlateImageList,
            List<Image<Gray, Byte>> filteredLicensePlateImageList,
            List<MCvBox2D> detectedLicensePlateRectangleList,
            List<String> licenseList
        )
        {
            for(; pointContour != null; pointContour = pointContour.HNext)
            {
                int childCount = GetChildCount(pointContour);

                if(childCount == 0)
                {
                    continue;
                }

                if(pointContour.Area > 400)
                {
                    if(childCount < 3)
                    {
                        // 윤곽선에 자식 윤곽선이 3개 보다 작은 경우는 자동차 번호판이 아니디.
                        // (자동차 번호판에 문자가 3자 이상 있다고 가정한다)
                        // 그러나 윤곽선의 자식 윤곽선을 검색해 그 중 하나가 자동차 번호판인지 확인해야 한다.
                        FindLicensePlate
                        (
                            pointContour.VNext,
                            grayscaleImage,
                            cannyImage,
                            licensePlateImageList,
                            filteredLicensePlateImageList,
                            detectedLicensePlateRectangleList,
                            licenseList
                        );

                        continue;
                    }

                    MCvBox2D rectangle = pointContour.GetMinAreaRect();

                    if(rectangle.angle < -45.0)
                    {
                        float temporaryWidth = rectangle.size.Width;

                        rectangle.size.Width  = rectangle.size.Height;
                        rectangle.size.Height = temporaryWidth;

                        rectangle.angle += 90.0f;
                    }
                    else if(rectangle.angle > 45.0)
                    {
                        float temporaryWidth = rectangle.size.Width;

                        rectangle.size.Width  = rectangle.size.Height;
                        rectangle.size.Height = temporaryWidth;

                        rectangle.angle -= 90.0f;
                    }

                    double ratio = (double)rectangle.size.Width / rectangle.size.Height;

                    if(!(3.0 < ratio && ratio < 10.0))
                    {
                        Contour<Point> childContour = pointContour.VNext;

                        if(childContour != null)
                        {
                            FindLicensePlate
                            (
                                childContour,
                                grayscaleImage,
                                cannyImage,
                                licensePlateImageList,
                                filteredLicensePlateImageList,
                                detectedLicensePlateRectangleList,
                                licenseList
                            );
                        }

                        continue;
                    }

                    using(Image<Gray, Byte> temporaryImage1 = grayscaleImage.Copy(rectangle))
                    {
                        using(Image<Gray, Byte> temporaryImage2 = temporaryImage1.Resize(240, 180, INTER.CV_INTER_CUBIC, true))
                        {
                            int edgePixelSize = 2;

                            temporaryImage2.ROI = new Rectangle
                            (
                                new Point(edgePixelSize, edgePixelSize),
                                temporaryImage2.Size - new Size(2 * edgePixelSize, 2 * edgePixelSize)
                            );

                            Image<Gray, Byte> plateImage = temporaryImage2.Copy();

                            Image<Gray, Byte> filteredPlateImage = FilterLicensePlateImage(plateImage);

                            Tesseract.Charactor[] charactorArray;

                            StringBuilder stringBuilder = new StringBuilder();

                            using(Image<Gray, Byte> temporaryImage3 = filteredPlateImage.Clone())
                            {
                                this.ocr.Recognize(temporaryImage3);

                                charactorArray = this.ocr.GetCharactors();

                                if(charactorArray.Length == 0)
                                {
                                    continue;
                                }

                                for(int i = 0; i < charactorArray.Length; i++)
                                {
                                    stringBuilder.Append(charactorArray[i].Text);
                                }
                            }

                            licenseList.Add(stringBuilder.ToString());

                            licensePlateImageList.Add(plateImage);

                            filteredLicensePlateImageList.Add(filteredPlateImage);

                            detectedLicensePlateRectangleList.Add(rectangle);
                        }
                    }
                }
            }
        }

        #endregion
        #region 자동차 번호판 이미지 필터하기 - FilterLicensePlateImage(sourceImage)

        /// <summary>
        /// 자동차 번호판 이미지 필터하기
        /// </summary>
        /// <param name="sourceImage">소스 이미지</param>
        /// <returns>필터 이미지</returns>
        private static Image<Gray, Byte> FilterLicensePlateImage(Image<Gray, Byte> sourceImage)
        {
            Image<Gray, Byte> threshImage = sourceImage.ThresholdBinaryInv(new Gray(120), new Gray(255));

            using(Image<Gray, Byte> maskImage = new Image<Gray, byte>(sourceImage.Size))
            {
                using(Image<Gray, Byte> cannyImage = sourceImage.Canny(100, 50))
                {
                    using(MemStorage storage = new MemStorage())
                    {
                        maskImage.SetValue(255.0);

                        for(Contour<Point> pointContour = cannyImage.FindContours(CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE, RETR_TYPE.CV_RETR_EXTERNAL, storage);
                            pointContour != null; pointContour = pointContour.HNext)
                        {
                            Rectangle rectangle = pointContour.BoundingRectangle;

                            if(rectangle.Height > (sourceImage.Height >> 1))
                            {
                                rectangle.X -= 1;
                                rectangle.Y -= 1;

                                rectangle.Width  += 2;
                                rectangle.Height += 2;

                                rectangle.Intersect(sourceImage.ROI);

                                maskImage.Draw(rectangle, new Gray(0.0), -1);
                            }
                        }

                        threshImage.SetValue(0, maskImage);
                    }
                }
            }

            threshImage._Erode(1);
            threshImage._Dilate(1);

            return threshImage;
        }

        #endregion
        #region 객체 리소스 해제하기 - DisposeObject()

        /// <summary>
        /// 객체 리소스 해제하기
        /// </summary>
        protected override void DisposeObject()
        {
            this.ocr.Dispose();
        }

        #endregion
    }
}

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using System;

using System.Collections.Generic;

using System.Drawing;

using System.Text;

using Emgu.CV;

using Emgu.CV.CvEnum;

using Emgu.CV.OCR;

using Emgu.CV.Structure;

using Emgu.Util;

namespace TestProject

{

/// <summary>

/// 자동차 번호판 검출기

/// </summary>

public class LicensePlateDetector : DisposableObject

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// OCR

/// </summary>

private Tesseract ocr;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - LicensePlateDetector(dataPath)

/// <summary>

/// 생성자

/// </summary>

/// <param name="dataPath">데이터 경로</param>

public LicensePlateDetector(string dataPath)

{

this.ocr = new Tesseract(dataPath, "eng", Tesseract.OcrEngineMode.OEM_TESSERACT_CUBE_COMBINED);

this.ocr.SetVariable("tessedit_char_whitelist", "ABCDEFGHIJKLMNOPQRSTUVWXYZ-1234567890");

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 자동차 번호판 검출하기 - DetectLicensePlate(sourceImage, licensePlateImageList, filteredLicensePlateImageList, detectedLicensePlateRectangleList)

/// <summary>

/// 자동차 번호판 검출하기

/// </summary>

/// <param name="sourceImage">소스 이미지</param>

/// <param name="licensePlateImageList">자동차 번호판 이미지 리스트</param>

/// <param name="filteredLicensePlateImageList">필터 자동차 번호판 이미지 리스트</param>

/// <param name="detectedLicensePlateRectangleList">검출 자동차 번호판 사각형 리스트</param>

/// <returns>자동차 번호 리스트</returns>

public List<string> DetectLicensePlate

(

Image<Bgr, byte> sourceImage,

List<Image<Gray, Byte>> licensePlateImageList,

List<Image<Gray, Byte>> filteredLicensePlateImageList,

List<MCvBox2D> detectedLicensePlateRectangleList)

{

List<string> licenseList = new List<String>();

using(Image<Gray, byte> grayscaleImage = sourceImage.Convert<Gray, Byte>())

{

using(Image<Gray, Byte> cannyImage = new Image<Gray, byte>(grayscaleImage.Size))

{

using(MemStorage storage = new MemStorage())

{

CvInvoke.cvCanny(grayscaleImage, cannyImage, 100, 50, 3);

Contour<Point> pointContour = cannyImage.FindContours

(

CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE,

RETR_TYPE.CV_RETR_TREE,

storage

);

FindLicensePlate

(

pointContour,

grayscaleImage,

cannyImage,

licensePlateImageList,

filteredLicensePlateImageList,

detectedLicensePlateRectangleList,

licenseList

);

}

return licenseList;

}

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 흰색 픽셀 마스크 구하기 - GetWhitePixelMask(image)

/// <summary>

/// 흰색 픽셀 마스크 구하기

/// </summary>

/// <param name="image">이미지</param>

/// <returns>흰색 픽셀 마스크</returns>

/// <remarks>

/// 흰색 픽셀은 채도가 40보다 작거나 200보다 큰 경우에 해당한다.

/// </remarks>

private static Image<Gray, Byte> GetWhitePixelMask(Image<Bgr, byte> image)

{

using(Image<Hsv, Byte> hsvImage = image.Convert<Hsv, Byte>())

{

Image<Gray, Byte>[] grayscaleImageArray = hsvImage.Split();

try

{

grayscaleImageArray[1]._ThresholdBinaryInv(new Gray(40), new Gray(255));

grayscaleImageArray[2]._ThresholdBinary(new Gray(200), new Gray(255));

CvInvoke.cvAnd(grayscaleImageArray[1], grayscaleImageArray[2], grayscaleImageArray[0], IntPtr.Zero);

}

finally

{

grayscaleImageArray[1].Dispose();

grayscaleImageArray[2].Dispose();

}

return grayscaleImageArray[0];

}

#endregion

#region 자식 카운트 구하기 - GetChildCount(contour)

/// <summary>

/// 자식 카운트 구하기

/// </summary>

/// <param name="contour">윤곽</param>

/// <returns>자식 카운트</returns>

private static int GetChildCount(Contour<Point> contour)

{

Contour<Point> childContour = contour.VNext;

if(childContour == null)

{

return 0;

}

int count = 0;

while(childContour != null)

{

count++;

childContour = childContour.HNext;

}

return count;

}

#endregion

#region 자동차 번호판 찾기 - FindLicensePlate(pointContour, grayscaleImage, cannyImage, licensePlateImageList, filteredLicensePlateImageList,

detectedLicensePlateRectangleList, licenseList)

/// <summary>

/// 자동차 번호판 찾기

/// </summary>

/// <param name="pointContour">포인트 윤곽</param>

/// <param name="grayscaleImage">회색조 이미지</param>

/// <param name="cannyImage">캐니 이미지</param>

/// <param name="licensePlateImageList">자동차 번호판 이미지 리스트</param>

/// <param name="filteredLicensePlateImageList">필터 자동차 번호판 이미지 리스트</param>

/// <param name="detectedLicensePlateRectangleList">검출 자동차 번호판 사각형 리스트</param>

/// <param name="licenseList">자동차 번호 리스트</param>

private void FindLicensePlate

(

Contour<Point> pointContour,

Image<Gray, Byte> grayscaleImage,

Image<Gray, Byte> cannyImage,

List<Image<Gray, Byte>> licensePlateImageList,

List<Image<Gray, Byte>> filteredLicensePlateImageList,

List<MCvBox2D> detectedLicensePlateRectangleList,

List<String> licenseList

)

{

for(; pointContour != null; pointContour = pointContour.HNext)

{

int childCount = GetChildCount(pointContour);

if(childCount == 0)

{

continue;

}

if(pointContour.Area > 400)

{

if(childCount < 3)

{

// 윤곽선에 자식 윤곽선이 3개 보다 작은 경우는 자동차 번호판이 아니디.

// (자동차 번호판에 문자가 3자 이상 있다고 가정한다)

// 그러나 윤곽선의 자식 윤곽선을 검색해 그 중 하나가 자동차 번호판인지 확인해야 한다.

FindLicensePlate

(

pointContour.VNext,

grayscaleImage,

cannyImage,

licensePlateImageList,

filteredLicensePlateImageList,

detectedLicensePlateRectangleList,

licenseList

);

continue;

}

MCvBox2D rectangle = pointContour.GetMinAreaRect();

if(rectangle.angle < -45.0)

{

float temporaryWidth = rectangle.size.Width;

rectangle.size.Width = rectangle.size.Height;

rectangle.size.Height = temporaryWidth;

rectangle.angle += 90.0f;

}

else if(rectangle.angle > 45.0)

{

float temporaryWidth = rectangle.size.Width;

rectangle.size.Width = rectangle.size.Height;

rectangle.size.Height = temporaryWidth;

rectangle.angle -= 90.0f;

}

double ratio = (double)rectangle.size.Width / rectangle.size.Height;

if(!(3.0 < ratio && ratio < 10.0))

{

Contour<Point> childContour = pointContour.VNext;

if(childContour != null)

{

FindLicensePlate

(

childContour,

grayscaleImage,

cannyImage,

licensePlateImageList,

filteredLicensePlateImageList,

detectedLicensePlateRectangleList,

licenseList

);

}

continue;

}

using(Image<Gray, Byte> temporaryImage1 = grayscaleImage.Copy(rectangle))

{

using(Image<Gray, Byte> temporaryImage2 = temporaryImage1.Resize(240, 180, INTER.CV_INTER_CUBIC, true))

{

int edgePixelSize = 2;

temporaryImage2.ROI = new Rectangle

(

new Point(edgePixelSize, edgePixelSize),

temporaryImage2.Size - new Size(2 * edgePixelSize, 2 * edgePixelSize)

);

Image<Gray, Byte> plateImage = temporaryImage2.Copy();

Image<Gray, Byte> filteredPlateImage = FilterLicensePlateImage(plateImage);

Tesseract.Charactor[] charactorArray;

StringBuilder stringBuilder = new StringBuilder();

using(Image<Gray, Byte> temporaryImage3 = filteredPlateImage.Clone())

{

this.ocr.Recognize(temporaryImage3);

charactorArray = this.ocr.GetCharactors();

if(charactorArray.Length == 0)

{

continue;

}

for(int i = 0; i < charactorArray.Length; i++)

{

stringBuilder.Append(charactorArray[i].Text);

}

licenseList.Add(stringBuilder.ToString());

licensePlateImageList.Add(plateImage);

filteredLicensePlateImageList.Add(filteredPlateImage);

detectedLicensePlateRectangleList.Add(rectangle);

}

#endregion

#region 자동차 번호판 이미지 필터하기 - FilterLicensePlateImage(sourceImage)

/// <summary>

/// 자동차 번호판 이미지 필터하기

/// </summary>

/// <param name="sourceImage">소스 이미지</param>

/// <returns>필터 이미지</returns>

private static Image<Gray, Byte> FilterLicensePlateImage(Image<Gray, Byte> sourceImage)

{

Image<Gray, Byte> threshImage = sourceImage.ThresholdBinaryInv(new Gray(120), new Gray(255));

using(Image<Gray, Byte> maskImage = new Image<Gray, byte>(sourceImage.Size))

{

using(Image<Gray, Byte> cannyImage = sourceImage.Canny(100, 50))

{

using(MemStorage storage = new MemStorage())

{

maskImage.SetValue(255.0);

for(Contour<Point> pointContour = cannyImage.FindContours(CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE, RETR_TYPE.CV_RETR_EXTERNAL, storage);

pointContour != null; pointContour = pointContour.HNext)

{

Rectangle rectangle = pointContour.BoundingRectangle;

if(rectangle.Height > (sourceImage.Height >> 1))

{

rectangle.X -= 1;

rectangle.Y -= 1;

rectangle.Width += 2;

rectangle.Height += 2;

rectangle.Intersect(sourceImage.ROI);

maskImage.Draw(rectangle, new Gray(0.0), -1);

}

threshImage.SetValue(0, maskImage);

}

threshImage._Erode(1);

threshImage._Dilate(1);

return threshImage;

}

#endregion

#region 객체 리소스 해제하기 - DisposeObject()

/// <summary>

/// 객체 리소스 해제하기

/// </summary>

protected override void DisposeObject()

{

this.ocr.Dispose();

}

#endregion

}

▶ MainForm.cs


using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.Structure;
using Emgu.CV.UI;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 번호판 검출기
        /// </summary>
        private LicensePlateDetector licensePlateDetector;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            this.filePathButton.Click += filePathButton_Click;

            this.licensePlateDetector = new LicensePlateDetector("");

            ProcessImage(new Image<Bgr, byte>("LicensePlate.jpg"));
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 파일 경로 버튼 클릭시 처리하기 - filePathButton_Click(sender, e)

        /// <summary>
        /// 파일 경로 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void filePathButton_Click(object sender, EventArgs e)
        {
            DialogResult result = this.openFileDialog.ShowDialog();

            if(result == DialogResult.OK)
            {
                Image<Bgr, Byte> image;

                try
                {
                    image = new Image<Bgr, byte>(this.openFileDialog.FileName);
                }
                catch
                {
                    MessageBox.Show(string.Format("무효한 파일 : {0}", this.openFileDialog.FileName));

                    return;
                }

                ProcessImage(image);
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 레이블/이미지 추가하기 - AddLabelAndImage(startPoint, labelText, image)

        /// <summary>
        /// 레이블/이미지 추가하기
        /// </summary>
        /// <param name="startPoint">시작 위치</param>
        /// <param name="labelText">레이블 텍스트</param>
        /// <param name="image">이미지</param>
        private void AddLabelAndImage(ref Point startPoint, string labelText, IImage image)
        {
            Label label = new Label();

            this.resultPanel.Controls.Add(label);

            label.Width    = 200;
            label.Height   = 30;
            label.Location = startPoint;
            label.Text     = labelText;

            startPoint.Y += label.Height;

            ImageBox imageBox = new ImageBox();

            this.resultPanel.Controls.Add(imageBox);

            imageBox.ClientSize = image.Size;
            imageBox.Location   = startPoint;
            imageBox.Image      = image;

            startPoint.Y += imageBox.Height + 10;
        }

        #endregion
        #region 이미지 처리하기 - ProcessImage(image)

        /// <summary>
        /// 이미지 처리하기
        /// </summary>
        /// <param name="image">이미지</param>
        private void ProcessImage(Image<Bgr, byte> image)
        {
            Stopwatch stopwatch = Stopwatch.StartNew();

            List<Image<Gray, Byte>> licensePlateImageList = new List<Image<Gray, byte>>();

            List<Image<Gray, Byte>> filteredLicensePlateImageList = new List<Image<Gray, byte>>();

            List<MCvBox2D> licenseRectangleList = new List<MCvBox2D>();

            List<string> licensePlateArray = this.licensePlateDetector.DetectLicensePlate
            (
                image,
                licensePlateImageList,
                filteredLicensePlateImageList,
                licenseRectangleList
            );

            stopwatch.Stop();

            this.messageLabel.Text = string.Format("자동차 번호판 인식 시간 : {0} 밀리초", stopwatch.Elapsed.TotalMilliseconds);

            this.resultPanel.Controls.Clear();

            Point startPoint = new Point(10, 10);

            for(int i = 0; i < licensePlateArray.Count; i++)
            {
                AddLabelAndImage
                (
                    ref startPoint,
                    string.Format("자동차 번호 : {0}", licensePlateArray[i]),
                    licensePlateImageList[i].ConcateVertical(filteredLicensePlateImageList[i])
                );

                image.Draw(licenseRectangleList[i], new Bgr(Color.Red), 2);
            }

            this.imageBox.Image = image;
        }

        #endregion
    }
}

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using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Drawing;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.Structure;

using Emgu.CV.UI;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 번호판 검출기

/// </summary>

private LicensePlateDetector licensePlateDetector;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

this.filePathButton.Click += filePathButton_Click;

this.licensePlateDetector = new LicensePlateDetector("");

ProcessImage(new Image<Bgr, byte>("LicensePlate.jpg"));

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 파일 경로 버튼 클릭시 처리하기 - filePathButton_Click(sender, e)

/// <summary>

/// 파일 경로 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void filePathButton_Click(object sender, EventArgs e)

{

DialogResult result = this.openFileDialog.ShowDialog();

if(result == DialogResult.OK)

{

Image<Bgr, Byte> image;

try

{

image = new Image<Bgr, byte>(this.openFileDialog.FileName);

}

catch

{

MessageBox.Show(string.Format("무효한 파일 : {0}", this.openFileDialog.FileName));

return;

}

ProcessImage(image);

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 레이블/이미지 추가하기 - AddLabelAndImage(startPoint, labelText, image)

/// <summary>

/// 레이블/이미지 추가하기

/// </summary>

/// <param name="startPoint">시작 위치</param>

/// <param name="labelText">레이블 텍스트</param>

/// <param name="image">이미지</param>

private void AddLabelAndImage(ref Point startPoint, string labelText, IImage image)

{

Label label = new Label();

this.resultPanel.Controls.Add(label);

label.Width = 200;

label.Height = 30;

label.Location = startPoint;

label.Text = labelText;

startPoint.Y += label.Height;

ImageBox imageBox = new ImageBox();

this.resultPanel.Controls.Add(imageBox);

imageBox.ClientSize = image.Size;

imageBox.Location = startPoint;

imageBox.Image = image;

startPoint.Y += imageBox.Height + 10;

}

#endregion

#region 이미지 처리하기 - ProcessImage(image)

/// <summary>

/// 이미지 처리하기

/// </summary>

/// <param name="image">이미지</param>

private void ProcessImage(Image<Bgr, byte> image)

{

Stopwatch stopwatch = Stopwatch.StartNew();

List<Image<Gray, Byte>> licensePlateImageList = new List<Image<Gray, byte>>();

List<Image<Gray, Byte>> filteredLicensePlateImageList = new List<Image<Gray, byte>>();

List<MCvBox2D> licenseRectangleList = new List<MCvBox2D>();

List<string> licensePlateArray = this.licensePlateDetector.DetectLicensePlate

(

image,

licensePlateImageList,

filteredLicensePlateImageList,

licenseRectangleList

);

stopwatch.Stop();

this.messageLabel.Text = string.Format("자동차 번호판 인식 시간 : {0} 밀리초", stopwatch.Elapsed.TotalMilliseconds);

this.resultPanel.Controls.Clear();

Point startPoint = new Point(10, 10);

for(int i = 0; i < licensePlateArray.Count; i++)

{

AddLabelAndImage

(

ref startPoint,

string.Format("자동차 번호 : {0}", licensePlateArray[i]),

licensePlateImageList[i].ConcateVertical(filteredLicensePlateImageList[i])

);

image.Draw(licenseRectangleList[i], new Bgr(Color.Red), 2);

}

this.imageBox.Image = image;

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] 도형 검출하기

■ 도형을 검출하는 방법을 보여준다. ▶ MainForm.cs


using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            this.filePathTextBox.TextChanged += filePathTextBox_TextChanged;
            this.filePathButton.Click        += filePathButton_Click;

            this.filePathTextBox.Text = "sample.png";
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 파일 경로 텍스트 박스 텍스트 변경시 처리하기 - filePathTextBox_TextChanged(sender, e)

        /// <summary>
        /// 파일 경로 텍스트 박스 텍스트 변경시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void filePathTextBox_TextChanged(object sender, EventArgs e)
        {
            DetectShape();
        }

        #endregion
        #region 파일 경로 버튼 클릭시 처리하기 - filePathButton_Click(sender, e)

        /// <summary>
        /// 파일 경로 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void filePathButton_Click(object sender, EventArgs e)
        {
            DialogResult result = this.openFileDialog.ShowDialog();

            if(result == DialogResult.OK || result == DialogResult.Yes)
            {
                this.filePathTextBox.Text = this.openFileDialog.FileName;
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 도형 검출하기 - DetectShape()

        /// <summary>
        /// 도형 검출하기
        /// </summary>
        public void DetectShape()
        {
            if(this.filePathTextBox.Text != string.Empty)
            {
                StringBuilder stringBuilder = new StringBuilder("성능 : ");

                Image<Bgr, Byte> sourceImage = new Image<Bgr, byte>(this.filePathTextBox.Text).Resize(400, 400, INTER.CV_INTER_LINEAR, true);

                Image<Gray, Byte> grayscaleImage = sourceImage.Convert<Gray, Byte>().PyrDown().PyrUp();

                Stopwatch stopwatch = Stopwatch.StartNew();

                #region 원을 검출한다.

                double cannyThreshold             = 180.0;
                double circleAccumulatorThreshold = 120;

                CircleF[][] circleArray = grayscaleImage.HoughCircles
                (
                    new Gray(cannyThreshold),
                    new Gray(circleAccumulatorThreshold),
                    2.0,  // 원 중심 검출에 사용되는 누산기 해상도
                    20.0, // 최소 거리
                    5,    // 최소 반경
                    0     // 최대 반경
                );

                #endregion

                stopwatch.Stop();

                stringBuilder.Append(String.Format("원 - {0} 밀리초; ", stopwatch.ElapsedMilliseconds));

                stopwatch.Reset();

                stopwatch.Start();

                #region 선을 검출한다.

                double cannyThresholdLinking = 120.0;

                Image<Gray, Byte> cannyEdges = grayscaleImage.Canny(cannyThreshold, cannyThresholdLinking);

                LineSegment2D[][] lineArray = cannyEdges.HoughLinesBinary
                (
                    1,              // 거리 해상도 (픽셀 관련 단위)
                    Math.PI / 45.0, // 라디안으로 측정되는 각도 해상도
                    20,             // 한계점
                    30,             // 최소 선 너비
                    10              // 선간 간격
                );

                #endregion

                stopwatch.Stop();

                stringBuilder.Append(String.Format("선 - {0} 밀리초; ", stopwatch.ElapsedMilliseconds));

                stopwatch.Reset();

                stopwatch.Start();

                #region 삼각형과 사각형을 검출한다.

                List<Triangle2DF> triangleList = new List<Triangle2DF>();

                List<MCvBox2D> rectangleList = new List<MCvBox2D>();

                using(MemStorage storage = new MemStorage())
                {
                    for(Contour<Point> pointContour = cannyEdges.FindContours(CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE, RETR_TYPE.CV_RETR_LIST, storage);
                        pointContour != null; pointContour = pointContour.HNext)
                    {
                        Contour<Point> currentContour = pointContour.ApproxPoly(pointContour.Perimeter * 0.05, storage);

                        if(currentContour.Area > 250)
                        {
                            if(currentContour.Total == 3) // 삼각형인 경우
                            {
                                Point[] pointArray = currentContour.ToArray();

                                triangleList.Add(new Triangle2DF(pointArray[0], pointArray[1], pointArray[2]));
                            }
                            else if(currentContour.Total == 4) // 사각형인 경우
                            {
                                #region 윤곽의 모든 각도가 [80, 100]도 이내인지 결정한다.

                                bool isRectangle = true;

                                Point[] pointArray = currentContour.ToArray();

                                LineSegment2D[] edgeArray = PointCollection.PolyLine(pointArray, true);

                                for(int i = 0; i < edgeArray.Length; i++)
                                {
                                    double angle = Math.Abs(edgeArray[(i + 1) % edgeArray.Length].GetExteriorAngleDegree(edgeArray[i]));

                                    if(angle < 80 || angle > 100)
                                    {
                                        isRectangle = false;

                                        break;
                                    }
                                }

                                #endregion

                                if(isRectangle)
                                {
                                    rectangleList.Add(currentContour.GetMinAreaRect());
                                }
                            }
                        }
                    }
                }

                #endregion

                stopwatch.Stop();

                stringBuilder.Append(String.Format("삼각형/사각형 - {0} 밀리초; ", stopwatch.ElapsedMilliseconds));

                Text = stringBuilder.ToString();

                this.originalImageBox.Image = sourceImage;

                #region 삼각형/사각형을 그린다.

                Image<Bgr, Byte> triangleRectangleImage = sourceImage.CopyBlank();

                foreach(Triangle2DF triangle in triangleList)
                {
                    triangleRectangleImage.Draw(triangle, new Bgr(Color.DarkBlue), 2);
                }

                foreach(MCvBox2D rectangle in rectangleList)
                {
                    triangleRectangleImage.Draw(rectangle, new Bgr(Color.DarkOrange), 2);
                }

                this.triangleRectangleImageBox.Image = triangleRectangleImage;

                #endregion
                #region 원을 그린다.

                Image<Bgr, Byte> circleImage = sourceImage.CopyBlank();

                foreach(CircleF circle in circleArray[0])
                {
                    circleImage.Draw(circle, new Bgr(Color.Brown), 2);
                }

                this.circleImageBox.Image = circleImage;

                #endregion
                #region 선을 그린다.

                Image<Bgr, Byte> lineImage = sourceImage.CopyBlank();

                foreach(LineSegment2D line in lineArray[0])
                {
                    lineImage.Draw(line, new Bgr(Color.Green), 2);
                }

                this.lineImageBox.Image = lineImage;

                #endregion
            }
        }

        #endregion
    }
}

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using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.CvEnum;

using Emgu.CV.Structure;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

this.filePathTextBox.TextChanged += filePathTextBox_TextChanged;

this.filePathButton.Click += filePathButton_Click;

this.filePathTextBox.Text = "sample.png";

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 파일 경로 텍스트 박스 텍스트 변경시 처리하기 - filePathTextBox_TextChanged(sender, e)

/// <summary>

/// 파일 경로 텍스트 박스 텍스트 변경시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void filePathTextBox_TextChanged(object sender, EventArgs e)

{

DetectShape();

}

#endregion

#region 파일 경로 버튼 클릭시 처리하기 - filePathButton_Click(sender, e)

/// <summary>

/// 파일 경로 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void filePathButton_Click(object sender, EventArgs e)

{

DialogResult result = this.openFileDialog.ShowDialog();

if(result == DialogResult.OK || result == DialogResult.Yes)

{

this.filePathTextBox.Text = this.openFileDialog.FileName;

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 도형 검출하기 - DetectShape()

/// <summary>

/// 도형 검출하기

/// </summary>

public void DetectShape()

{

if(this.filePathTextBox.Text != string.Empty)

{

StringBuilder stringBuilder = new StringBuilder("성능 : ");

Image<Bgr, Byte> sourceImage = new Image<Bgr, byte>(this.filePathTextBox.Text).Resize(400, 400, INTER.CV_INTER_LINEAR, true);

Image<Gray, Byte> grayscaleImage = sourceImage.Convert<Gray, Byte>().PyrDown().PyrUp();

Stopwatch stopwatch = Stopwatch.StartNew();

#region 원을 검출한다.

double cannyThreshold = 180.0;

double circleAccumulatorThreshold = 120;

CircleF[][] circleArray = grayscaleImage.HoughCircles

(

new Gray(cannyThreshold),

new Gray(circleAccumulatorThreshold),

2.0, // 원 중심 검출에 사용되는 누산기 해상도

20.0, // 최소 거리

5, // 최소 반경

0 // 최대 반경

);

#endregion

stopwatch.Stop();

stringBuilder.Append(String.Format("원 - {0} 밀리초; ", stopwatch.ElapsedMilliseconds));

stopwatch.Reset();

stopwatch.Start();

#region 선을 검출한다.

double cannyThresholdLinking = 120.0;

Image<Gray, Byte> cannyEdges = grayscaleImage.Canny(cannyThreshold, cannyThresholdLinking);

LineSegment2D[][] lineArray = cannyEdges.HoughLinesBinary

(

1, // 거리 해상도 (픽셀 관련 단위)

Math.PI / 45.0, // 라디안으로 측정되는 각도 해상도

20, // 한계점

30, // 최소 선 너비

10 // 선간 간격

);

#endregion

stopwatch.Stop();

stringBuilder.Append(String.Format("선 - {0} 밀리초; ", stopwatch.ElapsedMilliseconds));

stopwatch.Reset();

stopwatch.Start();

#region 삼각형과 사각형을 검출한다.

List<Triangle2DF> triangleList = new List<Triangle2DF>();

List<MCvBox2D> rectangleList = new List<MCvBox2D>();

using(MemStorage storage = new MemStorage())

{

for(Contour<Point> pointContour = cannyEdges.FindContours(CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE, RETR_TYPE.CV_RETR_LIST, storage);

pointContour != null; pointContour = pointContour.HNext)

{

Contour<Point> currentContour = pointContour.ApproxPoly(pointContour.Perimeter * 0.05, storage);

if(currentContour.Area > 250)

{

if(currentContour.Total == 3) // 삼각형인 경우

{

Point[] pointArray = currentContour.ToArray();

triangleList.Add(new Triangle2DF(pointArray[0], pointArray[1], pointArray[2]));

}

else if(currentContour.Total == 4) // 사각형인 경우

{

#region 윤곽의 모든 각도가 [80, 100]도 이내인지 결정한다.

bool isRectangle = true;

Point[] pointArray = currentContour.ToArray();

LineSegment2D[] edgeArray = PointCollection.PolyLine(pointArray, true);

for(int i = 0; i < edgeArray.Length; i++)

{

double angle = Math.Abs(edgeArray[(i + 1) % edgeArray.Length].GetExteriorAngleDegree(edgeArray[i]));

if(angle < 80 || angle > 100)

{

isRectangle = false;

break;

}

#endregion

if(isRectangle)

{

rectangleList.Add(currentContour.GetMinAreaRect());

}

#endregion

stopwatch.Stop();

stringBuilder.Append(String.Format("삼각형/사각형 - {0} 밀리초; ", stopwatch.ElapsedMilliseconds));

Text = stringBuilder.ToString();

this.originalImageBox.Image = sourceImage;

#region 삼각형/사각형을 그린다.

Image<Bgr, Byte> triangleRectangleImage = sourceImage.CopyBlank();

foreach(Triangle2DF triangle in triangleList)

{

triangleRectangleImage.Draw(triangle, new Bgr(Color.DarkBlue), 2);

}

foreach(MCvBox2D rectangle in rectangleList)

{

triangleRectangleImage.Draw(rectangle, new Bgr(Color.DarkOrange), 2);

}

this.triangleRectangleImageBox.Image = triangleRectangleImage;

#endregion

#region 원을 그린다.

Image<Bgr, Byte> circleImage = sourceImage.CopyBlank();

foreach(CircleF circle in circleArray[0])

{

circleImage.Draw(circle, new Bgr(Color.Brown), 2);

}

this.circleImageBox.Image = circleImage;

#endregion

#region 선을 그린다.

Image<Bgr, Byte> lineImage = sourceImage.CopyBlank();

foreach(LineSegment2D line in lineArray[0])

{

lineImage.Draw(line, new Bgr(Color.Green), 2);

}

this.lineImageBox.Image = lineImage;

#endregion

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] 얼굴 인식을 사용해 마우스 제어하기

■ 얼굴 인식을 사용해 마우스를 제어하는 방법을 보여준다. ▶ MainForm.cs


using System;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.Structure;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Import
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 커서 위치 구하기 - GetCursorPos(point)

        /// <summary>
        /// 커서 위치 구하기
        /// </summary>
        /// <param name="point">위치</param>
        /// <returns>처리 결과</returns>
        [DllImport("user32.dll")]
        private static extern bool GetCursorPos(out Point point);

        #endregion
        #region 커서 위치 설정하기 - SetCursorPos(x, y)

        /// <summary>
        /// 커서 위치 설정하기
        /// </summary>
        /// <param name="x">X 좌표</param>
        /// <param name="y">Y 좌표</param>
        /// <returns>처리 결과</returns>
        [DllImport("user32.dll")]
        private static extern bool SetCursorPos(int x, int y);

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 캡처
        /// </summary>
        private Capture capture;

        /// <summary>
        /// 분류기
        /// </summary>
        private CascadeClassifier classifier;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            this.classifier = new CascadeClassifier("haarcascade_frontalface_alt2.xml");

            if(this.capture == null)
            {
                try
                {
                    this.capture = new Capture();
                }
                catch(Exception exception)
                {
                    MessageBox.Show(exception.Message);

                    return;
                }
            }

            Application.Idle += Application_Idle;
            FormClosed       += Form_FormClosed;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 애플리케이션 휴지시 처리하기 - Application_Idle(sender, e)

        /// <summary>
        /// 애플리케이션 휴지시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Application_Idle(object sender, EventArgs e)
        {
            Image<Bgr, Byte> captureImage = this.capture.QueryFrame();

            Image<Gray, Byte> grayscaleImage = captureImage.Convert<Gray, Byte>();

            grayscaleImage._EqualizeHist();

            Rectangle imageRectangle = grayscaleImage.ROI;

            Rectangle mouseStableRectangle = new Rectangle
            (
                (int)(imageRectangle.Width  * 0.4),
                (int)(imageRectangle.Height * 0.4),
                (int)(imageRectangle.Width  * 0.2),
                (int)(imageRectangle.Height * 0.2)
            );

            captureImage.Draw(mouseStableRectangle, new Bgr(255, 0, 0), 1);

            Rectangle[] faceRectangleArray = this.classifier.DetectMultiScale
            (
                grayscaleImage,
                1.1,
                10,
                new Size(20, 20),
                Size.Empty
            );

            if(faceRectangleArray.Length > 0)
            {
                Rectangle maximumFaceRectangle = faceRectangleArray[0];

                for(int i = 1; i < faceRectangleArray.Length; i++)
                {
                    if(faceRectangleArray[i].Width * faceRectangleArray[i].Height > maximumFaceRectangle.Width * maximumFaceRectangle.Height)
                    {
                        maximumFaceRectangle = faceRectangleArray[i];
                    }
                }

                captureImage.Draw(maximumFaceRectangle, new Bgr(255, 255, 0.0), 1);

                Point maximumFaceRectangleCenter = new Point
                (
                    maximumFaceRectangle.X + maximumFaceRectangle.Width  / 2,
                    maximumFaceRectangle.Y + maximumFaceRectangle.Height / 2
                );

                Point imageRectangleCenter = new Point
                (
                    imageRectangle.X + imageRectangle.Width  / 2,
                    imageRectangle.Y + imageRectangle.Height / 2
                );

                captureImage.Draw
                (
                    new Cross2DF(maximumFaceRectangleCenter, maximumFaceRectangle.Width * 0.1f, maximumFaceRectangle.Height * 0.1f),
                    new Bgr(0, 255, 0),
                    1
                );

                if(!mouseStableRectangle.Contains(maximumFaceRectangleCenter))
                {
                    double horizontalFraction = (double)(maximumFaceRectangleCenter.X - imageRectangleCenter.X) / imageRectangle.Width;
                    double verticalFraction   = (double)(maximumFaceRectangleCenter.Y - imageRectangleCenter.Y) / imageRectangle.Height;

                    Rectangle primaryScreenRectangle = Screen.PrimaryScreen.Bounds;

                    int maximumMouseSpeed = primaryScreenRectangle.Width / 20;

                    Point mousePoint;

                    GetCursorPos(out mousePoint);

                    mousePoint.X = Math.Min(Math.Max(0, mousePoint.X + (int)((maximumMouseSpeed / 2) * horizontalFraction)), primaryScreenRectangle.Width );
                    mousePoint.Y = Math.Min(Math.Max(0, mousePoint.Y + (int)((maximumMouseSpeed / 2) * verticalFraction  )), primaryScreenRectangle.Height);

                    SetCursorPos(mousePoint.X, mousePoint.Y);
                }
            }

            this.imageBox.Image = captureImage;
        }

        #endregion
        #region 폼 닫는 경우 처리하기 - Form_FormClosed(sender, e)

        /// <summary>
        /// 폼 닫는 경우 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Form_FormClosed(object sender, FormClosedEventArgs e)
        {
            if(this.capture != null)
            {
                this.capture.Dispose();
            }
        }

        #endregion
        #region 수평 반전 버튼 클릭시 처리하기 - flipHorizontalButton_Click(sender, e)

        /// <summary>
        /// 수평 반전 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void flipHorizontalButton_Click(object sender, EventArgs e)
        {
            if(this.capture != null)
            {
                this.capture.FlipHorizontal = !this.capture.FlipHorizontal;
            }
        }

        #endregion
    }
}

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using System;

using System.Drawing;

using System.Runtime.InteropServices;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.Structure;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Import

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 커서 위치 구하기 - GetCursorPos(point)

/// <summary>

/// 커서 위치 구하기

/// </summary>

/// <param name="point">위치</param>

/// <returns>처리 결과</returns>

[DllImport("user32.dll")]

private static extern bool GetCursorPos(out Point point);

#endregion

#region 커서 위치 설정하기 - SetCursorPos(x, y)

/// <summary>

/// 커서 위치 설정하기

/// </summary>

/// <param name="x">X 좌표</param>

/// <param name="y">Y 좌표</param>

/// <returns>처리 결과</returns>

[DllImport("user32.dll")]

private static extern bool SetCursorPos(int x, int y);

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 캡처

/// </summary>

private Capture capture;

/// <summary>

/// 분류기

/// </summary>

private CascadeClassifier classifier;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

this.classifier = new CascadeClassifier("haarcascade_frontalface_alt2.xml");

if(this.capture == null)

{

try

{

this.capture = new Capture();

}

catch(Exception exception)

{

MessageBox.Show(exception.Message);

return;

}

Application.Idle += Application_Idle;

FormClosed += Form_FormClosed;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

#region 애플리케이션 휴지시 처리하기 - Application_Idle(sender, e)

/// <summary>

/// 애플리케이션 휴지시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void Application_Idle(object sender, EventArgs e)

{

Image<Bgr, Byte> captureImage = this.capture.QueryFrame();

Image<Gray, Byte> grayscaleImage = captureImage.Convert<Gray, Byte>();

grayscaleImage._EqualizeHist();

Rectangle imageRectangle = grayscaleImage.ROI;

Rectangle mouseStableRectangle = new Rectangle

(

(int)(imageRectangle.Width * 0.4),

(int)(imageRectangle.Height * 0.4),

(int)(imageRectangle.Width * 0.2),

(int)(imageRectangle.Height * 0.2)

);

captureImage.Draw(mouseStableRectangle, new Bgr(255, 0, 0), 1);

Rectangle[] faceRectangleArray = this.classifier.DetectMultiScale

(

grayscaleImage,

1.1,

10,

new Size(20, 20),

Size.Empty

);

if(faceRectangleArray.Length > 0)

{

Rectangle maximumFaceRectangle = faceRectangleArray[0];

for(int i = 1; i < faceRectangleArray.Length; i++)

{

if(faceRectangleArray[i].Width * faceRectangleArray[i].Height > maximumFaceRectangle.Width * maximumFaceRectangle.Height)

{

maximumFaceRectangle = faceRectangleArray[i];

}

captureImage.Draw(maximumFaceRectangle, new Bgr(255, 255, 0.0), 1);

Point maximumFaceRectangleCenter = new Point

(

maximumFaceRectangle.X + maximumFaceRectangle.Width / 2,

maximumFaceRectangle.Y + maximumFaceRectangle.Height / 2

);

Point imageRectangleCenter = new Point

(

imageRectangle.X + imageRectangle.Width / 2,

imageRectangle.Y + imageRectangle.Height / 2

);

captureImage.Draw

(

new Cross2DF(maximumFaceRectangleCenter, maximumFaceRectangle.Width * 0.1f, maximumFaceRectangle.Height * 0.1f),

new Bgr(0, 255, 0),

);

if(!mouseStableRectangle.Contains(maximumFaceRectangleCenter))

{

double horizontalFraction = (double)(maximumFaceRectangleCenter.X - imageRectangleCenter.X) / imageRectangle.Width;

double verticalFraction = (double)(maximumFaceRectangleCenter.Y - imageRectangleCenter.Y) / imageRectangle.Height;

Rectangle primaryScreenRectangle = Screen.PrimaryScreen.Bounds;

int maximumMouseSpeed = primaryScreenRectangle.Width / 20;

Point mousePoint;

GetCursorPos(out mousePoint);

mousePoint.X = Math.Min(Math.Max(0, mousePoint.X + (int)((maximumMouseSpeed / 2) * horizontalFraction)), primaryScreenRectangle.Width );

mousePoint.Y = Math.Min(Math.Max(0, mousePoint.Y + (int)((maximumMouseSpeed / 2) * verticalFraction )), primaryScreenRectangle.Height);

SetCursorPos(mousePoint.X, mousePoint.Y);

}

this.imageBox.Image = captureImage;

}

#endregion

#region 폼 닫는 경우 처리하기 - Form_FormClosed(sender, e)

/// <summary>

/// 폼 닫는 경우 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void Form_FormClosed(object sender, FormClosedEventArgs e)

{

if(this.capture != null)

{

this.capture.Dispose();

}

#endregion

#region 수평 반전 버튼 클릭시 처리하기 - flipHorizontalButton_Click(sender, e)

/// <summary>

/// 수평 반전 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void flipHorizontalButton_Click(object sender, EventArgs e)

{

if(this.capture != null)

{

this.capture.FlipHorizontal = !this.capture.FlipHorizontal;

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] 동작 검출하기

■ 동작을 검출하는 방법을 보여준다. ▶ MainForm.cs


using System;
using System.Drawing;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;
using Emgu.CV.VideoSurveillance;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 캡처
        /// </summary>
        private Capture capture;

        /// <summary>
        /// 동작 히스토리
        /// </summary>
        private MotionHistory motionHistory;

        /// <summary>
        /// BGFG 검출기
        /// </summary>
        private IBGFGDetector<Bgr> bgfgDetector;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            if(this.capture == null)
            {
                try
                {
                    this.capture = new Capture();
                }
                catch(Exception exception)
                {
                    MessageBox.Show(exception.Message);
                }
            }

            if(this.capture != null)
            {
                this.motionHistory = new MotionHistory
                (
                    1.0,  // 동작 히스토리 지속 시간 (초 단위)
                    0.05, // cvCalcMotionGradient용 maxDelta (초 단위)
                    0.5   // cvCalcMotionGradient용 minDelta (초 단위)
                );

                this.capture.ImageGrabbed += capture_ImageGrabbed;

                this.capture.Start();
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 폼 닫는 경우 처리하기 - Form_FormClosed(sender, e)

        /// <summary>
        /// 폼 닫는 경우 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Form_FormClosed(object sender, FormClosedEventArgs e)
        {
            this.capture.Stop();
        }

        #endregion
        #region 캡처 이미지 GRAB 처리하기 - capture_ImageGrabbed(sender, e)

        /// <summary>
        /// 캡처 이미지 GRAB 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void capture_ImageGrabbed(object sender, EventArgs e)
        {
            using(Image<Bgr, Byte> captureImage = this.capture.RetrieveBgrFrame())
            {
                using(MemStorage storage = new MemStorage())
                {
                    if(this.bgfgDetector == null)
                    {
                        this.bgfgDetector = new FGDetector<Bgr>(FORGROUND_DETECTOR_TYPE.FGD);
                    }

                    this.bgfgDetector.Update(captureImage);

                    this.captureImageBox.Image = captureImage;

                    this.motionHistory.Update(this.bgfgDetector.ForegroundMask);

                    this.forgroundMaskImageBox.Image = this.bgfgDetector.ForegroundMask;

                    #region 동작 마스크 복사본을 구하고 색상을 보정한다.

                    double[] minimumValueArray;
                    double[] maximumValueArray;
                    Point[]  minimumPointArray;
                    Point[]  maximumPointArray;

                    this.motionHistory.Mask.MinMax(out minimumValueArray, out maximumValueArray, out minimumPointArray, out maximumPointArray);

                    Image<Gray, Byte> motionMaskImage = this.motionHistory.Mask.Mul(255.0 / maximumValueArray[0]);

                    #endregion
                    #region 동작 이미지를 설정한다.

                    Image<Bgr, Byte> motionImage = new Image<Bgr, byte>(motionMaskImage.Size);

                    motionImage[0] = motionMaskImage;

                    #endregion

                    // 동작 영역을 정의하는 한계점은 미세 동작 검출 값을 줄인다.
                    double minimumArea = 100;

                    storage.Clear();

                    Seq<MCvConnectedComp> motionComponentSequence = this.motionHistory.GetMotionComponents(storage);

                    foreach(MCvConnectedComp motionComponent in motionComponentSequence)
                    {
                        if(motionComponent.area < minimumArea)
                        {
                            continue;
                        }

                        // 특정 영역의 각도와 동작 픽셀 카운트를 찾는다.
                        double angle;
                        double motionPixelCount;

                        this.motionHistory.MotionInfo(motionComponent.rect, out angle, out motionPixelCount);

                        if(motionPixelCount < motionComponent.area * 0.05)
                        {
                            continue;
                        }

                        DrawMotion(motionImage, motionComponent.rect, angle, new Bgr(Color.Red));
                    }

                    // 전체 동작 각도를 찾고 그린다.
                    double overallAngle;
                    double overallMotionPixelCount;

                    this.motionHistory.MotionInfo(motionMaskImage.ROI, out overallAngle, out overallMotionPixelCount);

                    DrawMotion(motionImage, motionMaskImage.ROI, overallAngle, new Bgr(Color.Green));

                    UpdateMessage
                    (
                        string.Format
                        (
                            "전체 탐지 동작 : {0}; 동작 픽셀 카운트 : {1}",
                            motionComponentSequence.Total,
                            overallMotionPixelCount
                        )
                    );

                    this.motionImageBox.Image = motionImage;
                }
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 메시지 갱신하기 - UpdateMessage(message)

        /// <summary>
        /// 메시지 갱신하기
        /// </summary>
        /// <param name="message">메시지</param>
        private void UpdateMessage(string message)
        {
            if(InvokeRequired && !IsDisposed)
            {
                Invoke((Action<string>)UpdateMessage, message);
            }
            else
            {
                this.message.Text = message;
            }
        }

        #endregion
        #region 동작 그리기 - DrawMotion(image, motionRectangle, angle, color)

        /// <summary>
        /// 동작 그리기
        /// </summary>
        /// <param name="image">이미지</param>
        /// <param name="motionRectangle">동작 사각형</param>
        /// <param name="angle">각도</param>
        /// <param name="color">색상</param>
        private static void DrawMotion(Image<Bgr, Byte> image, Rectangle motionRectangle, double angle, Bgr color)
        {
            float circleRadius = (motionRectangle.Width + motionRectangle.Height) >> 2;

            Point centerPoint = new Point
            (
                motionRectangle.X + motionRectangle.Width  >> 1,
                motionRectangle.Y + motionRectangle.Height >> 1
            );

            CircleF circle = new CircleF(centerPoint, circleRadius);

            int directionX = (int)(Math.Cos(angle * (Math.PI / 180.0)) * circleRadius);
            int directionY = (int)(Math.Sin(angle * (Math.PI / 180.0)) * circleRadius);

            Point pointOnCircle = new Point(centerPoint.X + directionX, centerPoint.Y - directionY);

            LineSegment2D line = new LineSegment2D(centerPoint, pointOnCircle);

            image.Draw(circle, color, 1);

            image.Draw(line, color, 2);
        }

        #endregion
    }
}

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using System;

using System.Drawing;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.CvEnum;

using Emgu.CV.Structure;

using Emgu.CV.VideoSurveillance;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 캡처

/// </summary>

private Capture capture;

/// <summary>

/// 동작 히스토리

/// </summary>

private MotionHistory motionHistory;

/// <summary>

/// BGFG 검출기

/// </summary>

private IBGFGDetector<Bgr> bgfgDetector;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

if(this.capture == null)

{

try

{

this.capture = new Capture();

}

catch(Exception exception)

{

MessageBox.Show(exception.Message);

}

if(this.capture != null)

{

this.motionHistory = new MotionHistory

(

1.0, // 동작 히스토리 지속 시간 (초 단위)

0.05, // cvCalcMotionGradient용 maxDelta (초 단위)

0.5 // cvCalcMotionGradient용 minDelta (초 단위)

);

this.capture.ImageGrabbed += capture_ImageGrabbed;

this.capture.Start();

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 폼 닫는 경우 처리하기 - Form_FormClosed(sender, e)

/// <summary>

/// 폼 닫는 경우 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void Form_FormClosed(object sender, FormClosedEventArgs e)

{

this.capture.Stop();

}

#endregion

#region 캡처 이미지 GRAB 처리하기 - capture_ImageGrabbed(sender, e)

/// <summary>

/// 캡처 이미지 GRAB 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void capture_ImageGrabbed(object sender, EventArgs e)

{

using(Image<Bgr, Byte> captureImage = this.capture.RetrieveBgrFrame())

{

using(MemStorage storage = new MemStorage())

{

if(this.bgfgDetector == null)

{

this.bgfgDetector = new FGDetector<Bgr>(FORGROUND_DETECTOR_TYPE.FGD);

}

this.bgfgDetector.Update(captureImage);

this.captureImageBox.Image = captureImage;

this.motionHistory.Update(this.bgfgDetector.ForegroundMask);

this.forgroundMaskImageBox.Image = this.bgfgDetector.ForegroundMask;

#region 동작 마스크 복사본을 구하고 색상을 보정한다.

double[] minimumValueArray;

double[] maximumValueArray;

Point[] minimumPointArray;

Point[] maximumPointArray;

this.motionHistory.Mask.MinMax(out minimumValueArray, out maximumValueArray, out minimumPointArray, out maximumPointArray);

Image<Gray, Byte> motionMaskImage = this.motionHistory.Mask.Mul(255.0 / maximumValueArray[0]);

#endregion

#region 동작 이미지를 설정한다.

Image<Bgr, Byte> motionImage = new Image<Bgr, byte>(motionMaskImage.Size);

motionImage[0] = motionMaskImage;

#endregion

// 동작 영역을 정의하는 한계점은 미세 동작 검출 값을 줄인다.

double minimumArea = 100;

storage.Clear();

Seq<MCvConnectedComp> motionComponentSequence = this.motionHistory.GetMotionComponents(storage);

foreach(MCvConnectedComp motionComponent in motionComponentSequence)

{

if(motionComponent.area < minimumArea)

{

continue;

}

// 특정 영역의 각도와 동작 픽셀 카운트를 찾는다.

double angle;

double motionPixelCount;

this.motionHistory.MotionInfo(motionComponent.rect, out angle, out motionPixelCount);

if(motionPixelCount < motionComponent.area * 0.05)

{

continue;

}

DrawMotion(motionImage, motionComponent.rect, angle, new Bgr(Color.Red));

}

// 전체 동작 각도를 찾고 그린다.

double overallAngle;

double overallMotionPixelCount;

this.motionHistory.MotionInfo(motionMaskImage.ROI, out overallAngle, out overallMotionPixelCount);

DrawMotion(motionImage, motionMaskImage.ROI, overallAngle, new Bgr(Color.Green));

UpdateMessage

(

string.Format

(

"전체 탐지 동작 : {0}; 동작 픽셀 카운트 : {1}",

motionComponentSequence.Total,

overallMotionPixelCount

)

);

this.motionImageBox.Image = motionImage;

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 메시지 갱신하기 - UpdateMessage(message)

/// <summary>

/// 메시지 갱신하기

/// </summary>

/// <param name="message">메시지</param>

private void UpdateMessage(string message)

{

if(InvokeRequired && !IsDisposed)

{

Invoke((Action<string>)UpdateMessage, message);

}

else

{

this.message.Text = message;

}

#endregion

#region 동작 그리기 - DrawMotion(image, motionRectangle, angle, color)

/// <summary>

/// 동작 그리기

/// </summary>

/// <param name="image">이미지</param>

/// <param name="motionRectangle">동작 사각형</param>

/// <param name="angle">각도</param>

/// <param name="color">색상</param>

private static void DrawMotion(Image<Bgr, Byte> image, Rectangle motionRectangle, double angle, Bgr color)

{

float circleRadius = (motionRectangle.Width + motionRectangle.Height) >> 2;

Point centerPoint = new Point

(

motionRectangle.X + motionRectangle.Width >> 1,

motionRectangle.Y + motionRectangle.Height >> 1

);

CircleF circle = new CircleF(centerPoint, circleRadius);

int directionX = (int)(Math.Cos(angle * (Math.PI / 180.0)) * circleRadius);

int directionY = (int)(Math.Sin(angle * (Math.PI / 180.0)) * circleRadius);

Point pointOnCircle = new Point(centerPoint.X + directionX, centerPoint.Y - directionY);

LineSegment2D line = new LineSegment2D(centerPoint, pointOnCircle);

image.Draw(circle, color, 1);

image.Draw(line, color, 2);

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] Hello World 출력하기

■ Hello World를 출력하는 방법을 보여준다. ▶ Program.cs


using System;
using System.Drawing;

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;

namespace HelloWorld
{
    /// <summary>
    /// 프로그램
    /// </summary>
    class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        private static void Main()
        {
            string windowName = "Hello, World!";

            CvInvoke.cvNamedWindow(windowName);

            Image<Bgr, Byte> image = new Image<Bgr, byte>(600, 450, new Bgr(255, 0, 0));

            MCvFont font = new MCvFont(FONT.CV_FONT_HERSHEY_COMPLEX, 1.0, 1.0);

            image.Draw("Hello, world", ref font, new Point(10, 80), new Bgr(0, 255, 0));

            CvInvoke.cvShowImage(windowName, image);

            CvInvoke.cvWaitKey(0);

            CvInvoke.cvDestroyWindow(windowName);
        }

        #endregion
    }
}

using System;

using System.Drawing;

using Emgu.CV;

using Emgu.CV.CvEnum;

using Emgu.CV.Structure;

namespace HelloWorld

{

/// <summary>

/// 프로그램

/// </summary>

class Program

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 프로그램 시작하기 - Main()

/// <summary>

/// 프로그램 시작하기

/// </summary>

private static void Main()

{

string windowName = "Hello, World!";

CvInvoke.cvNamedWindow(windowName);

Image<Bgr, Byte> image = new Image<Bgr, byte>(600, 450, new Bgr(255, 0, 0));

MCvFont font = new MCvFont(FONT.CV_FONT_HERSHEY_COMPLEX, 1.0, 1.0);

image.Draw("Hello, world", ref font, new Point(10, 80), new Bgr(0, 255, 0));

CvInvoke.cvShowImage(windowName, image);

CvInvoke.cvWaitKey(0);

CvInvoke.cvDestroyWindow(windowName);

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] HAAR 얼굴 검출하기

■ HAAR를 사용해 얼굴을 검출하는 방법을 보여준다. ▶ FaceDetectionHelper.cs


using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;

using Emgu.CV;
#if !IOS
using Emgu.CV.GPU;
#endif
using Emgu.CV.Structure;

namespace TestProject
{
    /// <summary>
    /// 얼굴 검출 헬퍼
    /// </summary>
    public static class FaceDetectionHelper
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 검출하기 - Detect(image, faceClassifierFilePath, eyeClassifierFilePath, faceRectangleList, eyeRectangleList, detectionTime)

        /// <summary>
        /// 검출하기
        /// </summary>
        /// <param name="image">이미지</param>
        /// <param name="faceClassifierFilePath">얼굴 분류기 파일 경로</param>
        /// <param name="eyeClassifierFilePath">눈 분류기 파일 경로</param>
        /// <param name="faceRectangleList">얼굴 사각형 리스트</param>
        /// <param name="eyeRectangleList">눈 사각형 리스트</param>
        /// <param name="detectionTime">검출 시간</param>
        public static void Detect(Image<Bgr, Byte> image, string faceClassifierFilePath, string eyeClassifierFilePath,
            List<Rectangle> faceRectangleList, List<Rectangle> eyeRectangleList, out long detectionTime)
        {
            Stopwatch stopWatch;

#if !IOS
            if(GpuInvoke.HasCuda)
            {
                using(GpuCascadeClassifier faceGpuCascadeClassifier = new GpuCascadeClassifier(faceClassifierFilePath))
                {
                    using(GpuCascadeClassifier eyeGpuCascadeClassifier = new GpuCascadeClassifier(eyeClassifierFilePath))
                    {
                        stopWatch = Stopwatch.StartNew();

                        using(GpuImage<Bgr, Byte> gpuImage = new GpuImage<Bgr, byte>(image))
                        {
                            using(GpuImage<Gray, Byte> gpuGray = gpuImage.Convert<Gray, Byte>())
                            {
                                Rectangle[] faceRectangleArray = faceGpuCascadeClassifier.DetectMultiScale(gpuGray, 1.1, 10, Size.Empty);

                                faceRectangleList.AddRange(faceRectangleArray);

                                foreach(Rectangle faceRectangle in faceRectangleArray)
                                {
                                    using(GpuImage<Gray, Byte> faceGpuImage = gpuGray.GetSubRect(faceRectangle))
                                    {
                                        using(GpuImage<Gray, Byte> cloneGpuImage = faceGpuImage.Clone())
                                        {
                                            Rectangle[] eyeRectangleArray = eyeGpuCascadeClassifier.DetectMultiScale(cloneGpuImage, 1.1, 10, Size.Empty);

                                            foreach(Rectangle eyeRectangle in eyeRectangleArray)
                                            {
                                                Rectangle temporaryEyeRectangle = eyeRectangle;

                                                temporaryEyeRectangle.Offset(faceRectangle.X, faceRectangle.Y);

                                                eyeRectangleList.Add(temporaryEyeRectangle);
                                            }
                                        }
                                    }
                                }
                            }
                        }

                        stopWatch.Stop();
                    }
                }
            }
            else
#endif
            {
                using(CascadeClassifier faceCascadeClassifier = new CascadeClassifier(faceClassifierFilePath))
                {
                    using(CascadeClassifier eyeCascadeClassifier = new CascadeClassifier(eyeClassifierFilePath))
                    {
                        stopWatch = Stopwatch.StartNew();

                        using(Image<Gray, Byte> grayImage = image.Convert<Gray, Byte>())
                        {
                            grayImage._EqualizeHist();

                            Rectangle[] faceRectangleArray = faceCascadeClassifier.DetectMultiScale
                            (
                                grayImage,
                                1.1,
                                10,
                                new Size(20, 20),
                                Size.Empty
                            );

                            faceRectangleList.AddRange(faceRectangleArray);

                            foreach(Rectangle faceRectangle in faceRectangleArray)
                            {
                                grayImage.ROI = faceRectangle;

                                Rectangle[] eyeRectangleArray = eyeCascadeClassifier.DetectMultiScale
                                (
                                    grayImage,
                                    1.1,
                                    10,
                                    new Size(20, 20),
                                    Size.Empty
                                );

                                grayImage.ROI = Rectangle.Empty;

                                foreach(Rectangle eyeRectangle in eyeRectangleArray)
                                {
                                    Rectangle temporaryEyeRectangle = eyeRectangle;

                                    temporaryEyeRectangle.Offset(faceRectangle.X, faceRectangle.Y);

                                    eyeRectangleList.Add(temporaryEyeRectangle);
                                }
                            }
                        }

                        stopWatch.Stop();
                    }
                }
            }

            detectionTime = stopWatch.ElapsedMilliseconds;
        }

        #endregion
    }
}

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using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Drawing;

using Emgu.CV;

#if !IOS

using Emgu.CV.GPU;

#endif

using Emgu.CV.Structure;

namespace TestProject

{

/// <summary>

/// 얼굴 검출 헬퍼

/// </summary>

public static class FaceDetectionHelper

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 검출하기 - Detect(image, faceClassifierFilePath, eyeClassifierFilePath, faceRectangleList, eyeRectangleList, detectionTime)

/// <summary>

/// 검출하기

/// </summary>

/// <param name="image">이미지</param>

/// <param name="faceClassifierFilePath">얼굴 분류기 파일 경로</param>

/// <param name="eyeClassifierFilePath">눈 분류기 파일 경로</param>

/// <param name="faceRectangleList">얼굴 사각형 리스트</param>

/// <param name="eyeRectangleList">눈 사각형 리스트</param>

/// <param name="detectionTime">검출 시간</param>

public static void Detect(Image<Bgr, Byte> image, string faceClassifierFilePath, string eyeClassifierFilePath,

List<Rectangle> faceRectangleList, List<Rectangle> eyeRectangleList, out long detectionTime)

{

Stopwatch stopWatch;

#if !IOS

if(GpuInvoke.HasCuda)

{

using(GpuCascadeClassifier faceGpuCascadeClassifier = new GpuCascadeClassifier(faceClassifierFilePath))

{

using(GpuCascadeClassifier eyeGpuCascadeClassifier = new GpuCascadeClassifier(eyeClassifierFilePath))

{

stopWatch = Stopwatch.StartNew();

using(GpuImage<Bgr, Byte> gpuImage = new GpuImage<Bgr, byte>(image))

{

using(GpuImage<Gray, Byte> gpuGray = gpuImage.Convert<Gray, Byte>())

{

Rectangle[] faceRectangleArray = faceGpuCascadeClassifier.DetectMultiScale(gpuGray, 1.1, 10, Size.Empty);

faceRectangleList.AddRange(faceRectangleArray);

foreach(Rectangle faceRectangle in faceRectangleArray)

{

using(GpuImage<Gray, Byte> faceGpuImage = gpuGray.GetSubRect(faceRectangle))

{

using(GpuImage<Gray, Byte> cloneGpuImage = faceGpuImage.Clone())

{

Rectangle[] eyeRectangleArray = eyeGpuCascadeClassifier.DetectMultiScale(cloneGpuImage, 1.1, 10, Size.Empty);

foreach(Rectangle eyeRectangle in eyeRectangleArray)

{

Rectangle temporaryEyeRectangle = eyeRectangle;

temporaryEyeRectangle.Offset(faceRectangle.X, faceRectangle.Y);

eyeRectangleList.Add(temporaryEyeRectangle);

}

stopWatch.Stop();

}

else

#endif

{

using(CascadeClassifier faceCascadeClassifier = new CascadeClassifier(faceClassifierFilePath))

{

using(CascadeClassifier eyeCascadeClassifier = new CascadeClassifier(eyeClassifierFilePath))

{

stopWatch = Stopwatch.StartNew();

using(Image<Gray, Byte> grayImage = image.Convert<Gray, Byte>())

{

grayImage._EqualizeHist();

Rectangle[] faceRectangleArray = faceCascadeClassifier.DetectMultiScale

(

grayImage,

1.1,

10,

new Size(20, 20),

Size.Empty

);

faceRectangleList.AddRange(faceRectangleArray);

foreach(Rectangle faceRectangle in faceRectangleArray)

{

grayImage.ROI = faceRectangle;

Rectangle[] eyeRectangleArray = eyeCascadeClassifier.DetectMultiScale

(

grayImage,

1.1,

10,

new Size(20, 20),

Size.Empty

);

grayImage.ROI = Rectangle.Empty;

foreach(Rectangle eyeRectangle in eyeRectangleArray)

{

Rectangle temporaryEyeRectangle = eyeRectangle;

temporaryEyeRectangle.Offset(faceRectangle.X, faceRectangle.Y);

eyeRectangleList.Add(temporaryEyeRectangle);

}

stopWatch.Stop();

}

detectionTime = stopWatch.ElapsedMilliseconds;

}

#endregion

}

▶ Program.cs


using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.Structure;
using Emgu.CV.UI;
using Emgu.CV.GPU;

namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    static class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        [STAThread]
        private static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            Image<Bgr, Byte> image = new Image<Bgr, byte>("sample.jpg");

            long detectionTime;

            List<Rectangle> faceRectangleList = new List<Rectangle>();
            List<Rectangle> eyeRectangleList  = new List<Rectangle>();

            FaceDetectionHelper.Detect
            (
                image,
                "haarcascade_frontalface_default.xml",
                "haarcascade_eye.xml",
                faceRectangleList,
                eyeRectangleList,
                out detectionTime
            );

            foreach(Rectangle faceRectangle in faceRectangleList)
            {
                image.Draw(faceRectangle, new Bgr(Color.Red), 1);
            }

            foreach(Rectangle eyeRectangle in eyeRectangleList)
            {
                image.Draw(eyeRectangle, new Bgr(Color.Blue), 2);
            }

            ImageViewer.Show
            (
                image,
                string.Format
                (
                    "{0}를 사용해 얼굴/눈 검출 완료 : {1} 밀리초",
                    GpuInvoke.HasCuda ? "GPU" : "CPU",
                    detectionTime
                )
            );
        }

        #endregion
    }
}

using System;

using System.Collections.Generic;

using System.Drawing;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.Structure;

using Emgu.CV.UI;

using Emgu.CV.GPU;

namespace TestProject

{

/// <summary>

/// 프로그램

/// </summary>

static class Program

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 프로그램 시작하기 - Main()

/// <summary>

/// 프로그램 시작하기

/// </summary>

[STAThread]

private static void Main()

{

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false);

Image<Bgr, Byte> image = new Image<Bgr, byte>("sample.jpg");

long detectionTime;

List<Rectangle> faceRectangleList = new List<Rectangle>();

List<Rectangle> eyeRectangleList = new List<Rectangle>();

FaceDetectionHelper.Detect

(

image,

"haarcascade_frontalface_default.xml",

"haarcascade_eye.xml",

faceRectangleList,

eyeRectangleList,

out detectionTime

);

foreach(Rectangle faceRectangle in faceRectangleList)

{

image.Draw(faceRectangle, new Bgr(Color.Red), 1);

}

foreach(Rectangle eyeRectangle in eyeRectangleList)

{

image.Draw(eyeRectangle, new Bgr(Color.Blue), 2);

}

ImageViewer.Show

(

image,

string.Format

(

"{0}를 사용해 얼굴/눈 검출 완료 : {1} 밀리초",

GpuInvoke.HasCuda ? "GPU" : "CPU",

detectionTime

)

);

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] 카메라 영상 캡처하기

■ 카메라 영상을 캡처하는 방법을 보여준다. ▶ MainForm.cs


using System;
using System.Windows.Forms;

using Emgu.CV;
using Emgu.CV.Structure;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 캡처
        /// </summary>
        private Capture capture = null;

        /// <summary>
        /// 캡처 여부
        /// </summary>
        private bool isCapturing;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            try
            {
                this.capture = new Capture();

                this.capture.ImageGrabbed += capture_ImageGrabbed;
            }
            catch(Exception exception)
            {
                MessageBox.Show(exception.Message);
            }

            FormClosed                      += Form_FormClosed;
            this.captureButton.Click        += captureButtonClick;
            this.flipHorizontalButton.Click += flipHorizontalButton_Click;
            this.flipVerticalButton.Click   += flipVerticalButton_Click;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 폼 닫는 경우 처리하기 - Form_FormClosed(sender, e)

        /// <summary>
        /// 폼 닫는 경우 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Form_FormClosed(object sender, FormClosedEventArgs e)
        {
            if(this.capture != null)
            {
                this.capture.Dispose();
            }
        }

        #endregion

        #region 캡처 이미지 GRAB 처리하기 - capture_ImageGrabbed(sender, e)

        /// <summary>
        /// 캡처 이미지 GRAB 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void capture_ImageGrabbed(object sender, EventArgs e)
        {
            Image<Bgr, Byte> captureImage = this.capture.RetrieveBgrFrame();

            Image<Gray, Byte> grayscaleImage           = captureImage.Convert<Gray, Byte>();
            Image<Gray, Byte> downSampleGrayscaleImage = grayscaleImage.PyrDown();
            Image<Gray, Byte> upSampleGrayscaleImage   = downSampleGrayscaleImage.PyrUp();
            Image<Gray, Byte> cannyImage               = upSampleGrayscaleImage.Canny(100, 60);

            this.captureImageBox.Image            = captureImage;
            this.grayscaleImageBox.Image          = grayscaleImage;
            this.GrayscaleSmoothingImageBox.Image = upSampleGrayscaleImage;
            this.cannyImageBox.Image              = cannyImage;
        }

        #endregion

        #region 캡처 버튼 클릭시 처리하기 - captureButtonClick(sender, e)

        /// <summary>
        /// 캡처 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void captureButtonClick(object sender, EventArgs e)
        {
            if(this.capture != null)
            {
                if(this.isCapturing)
                {
                    this.captureButton.Text = "캡처 시작";

                    this.capture.Pause();
                }
                else
                {
                    this.captureButton.Text = "캡처 중단";

                    this.capture.Start();
                }

                this.isCapturing = !this.isCapturing;
            }
        }

        #endregion
        #region 수평 반전 버튼 클릭시 처리하기 - flipHorizontalButton_Click(sender, e)

        /// <summary>
        /// 수평 반전 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void flipHorizontalButton_Click(object sender, EventArgs e)
        {
            if(this.capture != null)
            {
                this.capture.FlipHorizontal = !this.capture.FlipHorizontal;
            }
        }

        #endregion
        #region 수직 반전 버튼 클릭시 처리하기 - flipVerticalButton_Click(sender, e)

        /// <summary>
        /// 수직 반전 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void flipVerticalButton_Click(object sender, EventArgs e)
        {
            if(this.capture != null)
            {
                this.capture.FlipVertical = !this.capture.FlipVertical;
            }
        }

        #endregion
    }
}

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using System;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.CV.Structure;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 캡처

/// </summary>

private Capture capture = null;

/// <summary>

/// 캡처 여부

/// </summary>

private bool isCapturing;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

try

{

this.capture = new Capture();

this.capture.ImageGrabbed += capture_ImageGrabbed;

}

catch(Exception exception)

{

MessageBox.Show(exception.Message);

}

FormClosed += Form_FormClosed;

this.captureButton.Click += captureButtonClick;

this.flipHorizontalButton.Click += flipHorizontalButton_Click;

this.flipVerticalButton.Click += flipVerticalButton_Click;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 폼 닫는 경우 처리하기 - Form_FormClosed(sender, e)

/// <summary>

/// 폼 닫는 경우 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void Form_FormClosed(object sender, FormClosedEventArgs e)

{

if(this.capture != null)

{

this.capture.Dispose();

}

#endregion

#region 캡처 이미지 GRAB 처리하기 - capture_ImageGrabbed(sender, e)

/// <summary>

/// 캡처 이미지 GRAB 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void capture_ImageGrabbed(object sender, EventArgs e)

{

Image<Bgr, Byte> captureImage = this.capture.RetrieveBgrFrame();

Image<Gray, Byte> grayscaleImage = captureImage.Convert<Gray, Byte>();

Image<Gray, Byte> downSampleGrayscaleImage = grayscaleImage.PyrDown();

Image<Gray, Byte> upSampleGrayscaleImage = downSampleGrayscaleImage.PyrUp();

Image<Gray, Byte> cannyImage = upSampleGrayscaleImage.Canny(100, 60);

this.captureImageBox.Image = captureImage;

this.grayscaleImageBox.Image = grayscaleImage;

this.GrayscaleSmoothingImageBox.Image = upSampleGrayscaleImage;

this.cannyImageBox.Image = cannyImage;

}

#endregion

#region 캡처 버튼 클릭시 처리하기 - captureButtonClick(sender, e)

/// <summary>

/// 캡처 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void captureButtonClick(object sender, EventArgs e)

{

if(this.capture != null)

{

if(this.isCapturing)

{

this.captureButton.Text = "캡처 시작";

this.capture.Pause();

}

else

{

this.captureButton.Text = "캡처 중단";

this.capture.Start();

}

this.isCapturing = !this.isCapturing;

}

#endregion

#region 수평 반전 버튼 클릭시 처리하기 - flipHorizontalButton_Click(sender, e)

/// <summary>

/// 수평 반전 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void flipHorizontalButton_Click(object sender, EventArgs e)

{

if(this.capture != null)

{

this.capture.FlipHorizontal = !this.capture.FlipHorizontal;

}

#endregion

#region 수직 반전 버튼 클릭시 처리하기 - flipVerticalButton_Click(sender, e)

/// <summary>

/// 수직 반전 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void flipVerticalButton_Click(object sender, EventArgs e)

{

if(this.capture != null)

{

this.capture.FlipVertical = !this.capture.FlipVertical;

}

#endregion

}

TestProject.zip

[C#/WINFORM/EMGUCV] Image 클래스 : Convolution 메소드를 사용해 평균값 필터 회선 적용하기

■ Image 클래스의 Convolution 메소드를 사용해 평균값 필터 회선를 적용하는 방법을 보여준다. ▶ 예제 코드 (C#)


using Emgu.CV;
using Emgu.CV.Structure;

float[,] maskArray =
{
    { 1.0f / 9.0f, 1.0f / 9.0f, 1.0f / 9.0f },
    { 1.0f / 9.0f, 1.0f / 9.0f, 1.0f / 9.0f },
    { 1.0f / 9.0f, 1.0f / 9.0f, 1.0f / 9.0f }
};

ConvolutionKernelF convolutionKernelF = new ConvolutionKernelF(maskArray);

Image<Gray, float> sourceImage = new Image<Gray, float>("c:\\source.jpg");
Image<Gray, float> targetImage = sourceImage.Convolution(convolutionKernelF);

using Emgu.CV;

using Emgu.CV.Structure;

float[,] maskArray =

{

{ 1.0f / 9.0f, 1.0f / 9.0f, 1.0f / 9.0f },

{ 1.0f / 9.0f, 1.0f / 9.0f, 1.0f / 9.0f }

};

ConvolutionKernelF convolutionKernelF = new ConvolutionKernelF(maskArray);

Image<Gray, float> sourceImage = new Image<Gray, float>("c:\\source.jpg");

Image<Gray, float> targetImage = sourceImage.Convolution(convolutionKernelF);

[C#/WINFORM/EMGUCV] Image 클래스 : Erode 메소드를 사용해 최소값 필터 회선 적용하기

■ Image 클래스의 Erode 메소드를 사용해 최소값 필터 회선을 적용하는 방법을 보여준다. ▶ 예제 코드 (C#)


using Emgu.CV;
using Emgu.CV.Structure;

Image<Gray, byte> sourceImage = new Image<Gray, byte>("c:\\source.jpg");
Image<Gray, byte> targetImage = sourceImage.Erode(1);

using Emgu.CV;

using Emgu.CV.Structure;

Image<Gray, byte> sourceImage = new Image<Gray, byte>("c:\\source.jpg");

Image<Gray, byte> targetImage = sourceImage.Erode(1);

[C#/WINFORM/EMGUCV] Image 클래스 : Dilate 메소드를 사용해 최대값 필터 회선 적용하기

■ Image 클래스의 Dilate 메소드를 사용해 최대값 필터 회선을 적용하는 방법을 보여준다. ▶ 예제 코드 (C#)


using Emgu.CV;
using Emgu.CV.Structure;

Image<Gray, byte> sourceImage = new Image<Gray, byte>("c:\\source.jpg");
Image<Gray, byte> targetImage = sourceImage.Dilate(1);

using Emgu.CV;

using Emgu.CV.Structure;

Image<Gray, byte> sourceImage = new Image<Gray, byte>("c:\\source.jpg");

Image<Gray, byte> targetImage = sourceImage.Dilate(1);

[C#/WINFORM/EMGUCV] Image 클래스 : SmoothMedian 메소드를 사용해 중간값 필터 회선 적용하기

■ Image 클래스의 SmoothMedian 메소드를 사용해 중간값 필터 회선을 적용하는 방법을 보여준다. ▶ 예제 코드 (C#)


using Emgu.CV;
using Emgu.CV.Structure;

Image<Gray, byte> sourceImage = new Image<Gray, byte>("c:\\source.jpg");
Image<Gray, byte> targetImage = sourceImage.SmoothMedian(3);

using Emgu.CV;

using Emgu.CV.Structure;

Image<Gray, byte> sourceImage = new Image<Gray, byte>("c:\\source.jpg");

Image<Gray, byte> targetImage = sourceImage.SmoothMedian(3);

[C#/WINFORM/EMGUCV] Image 클래스 : Canny 메소드를 사용해 캐니 오퍼레이터 회선 적용하기

■ Image 클래스의 Canny 메소드를 사용해 캐니 오퍼레이터 회선을 적용하는 방법을 보여준다. ▶ 예제 코드 (C#)


using Emgu.CV;
using Emgu.CV.Structure;

Image<Gray, byte> sourceImage = new Image<Gray, byte>("c:\\source.jpg");
Image<Gray, byte> targetImage = sourceImage.Canny(30.0, 200.0);

using Emgu.CV;

using Emgu.CV.Structure;

Image<Gray, byte> sourceImage = new Image<Gray, byte>("c:\\source.jpg");

Image<Gray, byte> targetImage = sourceImage.Canny(30.0, 200.0);

[C#/WINFORM/EMGUCV] Image 클래스 : Convolution 메소드를 사용해 가우시안-라플라시안 에지 회선 적용하기

■ Image 클래스의 Convolution 메소드를 사용해 가우시안-라플라시안 에지 회선을 적용하는 방법을 보여준다. ▶ 예제 코드 (C#)


using Emgu.CV;
using Emgu.CV.Structure;

float[,] maskArray =
{
    { 0.0f, 0.0f, 3.0f,   2.0f,   2.0f,   2.0f, 3.0f, 0.0f, 0.0f },
    { 0.0f, 2.0f, 3.0f,   5.0f,   5.0f,   5.0f, 3.0f, 2.0f, 0.0f },
    { 3.0f, 3.0f, 5.0f,   3.0f,   0.0f,   3.0f, 5.0f, 3.0f, 3.0f },
    { 2.0f, 5.0f, 3.0f, -12.0f, -23.0f, -12.0f, 3.0f, 5.0f, 2.0f },
    { 2.0f, 5.0f, 0.0f, -23.0f, -40.0f, -23.0f, 0.0f, 5.0f, 2.0f },
    { 2.0f, 5.0f, 3.0f, -12.0f, -23.0f, -12.0f, 3.0f, 5.0f, 2.0f },
    { 3.0f, 3.0f, 5.0f,   3.0f,   0.0f,   3.0f, 5.0f, 3.0f, 3.0f },
    { 0.0f, 2.0f, 3.0f,   5.0f,   5.0f,   5.0f, 3.0f, 2.0f, 0.0f },
    { 0.0f, 0.0f, 3.0f,   2.0f,   2.0f,   2.0f, 3.0f, 0.0f, 0.0f }
};

ConvolutionKernelF convolutionKernelF = new ConvolutionKernelF(maskArray);

Image<Gray, float> sourceImage = new Image<Gray, float>("c:\\source.jpg");
Image<Gray, float> targetImage = sourceImage.Convolution(convolutionKernelF);

using Emgu.CV;

using Emgu.CV.Structure;

float[,] maskArray =

{

{ 0.0f, 0.0f, 3.0f, 2.0f, 2.0f, 2.0f, 3.0f, 0.0f, 0.0f },

{ 0.0f, 2.0f, 3.0f, 5.0f, 5.0f, 5.0f, 3.0f, 2.0f, 0.0f },

{ 3.0f, 3.0f, 5.0f, 3.0f, 0.0f, 3.0f, 5.0f, 3.0f, 3.0f },

{ 2.0f, 5.0f, 3.0f, -12.0f, -23.0f, -12.0f, 3.0f, 5.0f, 2.0f },

{ 2.0f, 5.0f, 0.0f, -23.0f, -40.0f, -23.0f, 0.0f, 5.0f, 2.0f },

{ 2.0f, 5.0f, 3.0f, -12.0f, -23.0f, -12.0f, 3.0f, 5.0f, 2.0f },

{ 3.0f, 3.0f, 5.0f, 3.0f, 0.0f, 3.0f, 5.0f, 3.0f, 3.0f },

{ 0.0f, 2.0f, 3.0f, 5.0f, 5.0f, 5.0f, 3.0f, 2.0f, 0.0f },

{ 0.0f, 0.0f, 3.0f, 2.0f, 2.0f, 2.0f, 3.0f, 0.0f, 0.0f }

};

ConvolutionKernelF convolutionKernelF = new ConvolutionKernelF(maskArray);

Image<Gray, float> sourceImage = new Image<Gray, float>("c:\\source.jpg");

Image<Gray, float> targetImage = sourceImage.Convolution(convolutionKernelF);

[C#/WINFORM/EMGUCV] Image 클래스 : Laplace 메소드를 사용해 라플라시안 에지 회선 적용하기

■ Image 클래스의 Laplace 메소드를 사용해 라플라시안 에지 회선을 적용하는 방법을 보여준다. ▶ 예제 코드 (C#)


using Emgu.CV;
using Emgu.CV.Structure;

Image<Gray, float> sourceImage = new Image<Gray, float>("c:\\source.jpg");
Image<Gray, float> targetImage = sourceImage.Laplace(3);

using Emgu.CV;

using Emgu.CV.Structure;

Image<Gray, float> sourceImage = new Image<Gray, float>("c:\\source.jpg");

Image<Gray, float> targetImage = sourceImage.Laplace(3);

[C#/WINFORM/EMGUCV] Image 클래스 : Sobel 메소드를 사용해 소벨 에지 X 회선 적용하기

■ Image 클래스의 Sobel 메소드를 사용해 소벨 에지 X 회선을 적용하는 방법을 보여준다. ▶ 예제 코드 (C#)


using Emgu.CV;
using Emgu.CV.Structure;

Image<Gray, float> sourceImage = new Image<Gray, float>("c:\\source.jpg");
Image<Gray, float> targetImage = sourceImage.Sobel(1, 0, 3);

using Emgu.CV;

using Emgu.CV.Structure;

Image<Gray, float> sourceImage = new Image<Gray, float>("c:\\source.jpg");

Image<Gray, float> targetImage = sourceImage.Sobel(1, 0, 3);